Holmium
About Holmium
In 1878, Marc Delafontain and Jacques-Louis Soret identified spectroscopic absorption bands of an unknown element whose oxide was isolated later that same year by Per Teodor Cleve. All three men are given credit for discovering this new element, which was named holmium after Cleve’s native Stockholm.
Holmium has the greatest magnetic strength of any element, and is used to create extremely strong magnetic fields as a magnetic flux concentrator within high-strength magnets. Holmium is used as a magnet component instead of for fabricating complete magnets because it is extremely rare.
Holmium’s other primary use is as a dopant in garnets, cubic zirconia, and glass. Holmium garnets are used in solid-state lasers that emit at wavelengths that make them safe for use in medical and dental applications, and they are also used in fiber optic communications devices. In glass and cubic zirconia, holmium provides yellow or red coloring and has distinctive absorption peaks that make them useful as calibration standards for optical spectrophotometers. Additionally, the radioactive isotope holmium-166m1 is used to calibrate gamma ray spectrometers.
Holmium is a rare earth element and can be found in any rare earth containing mineral, but as a heavy rare earth element (HREE) it is more common in HREE-enriched minerals such as xenotime and euxenite. Additionally, holmium is present in ion adsorption clays, which are a major source of HREEs due to their relative ease of processing, despite the low percentage quantities of rare earths they contain.
Products
Compounds
- Holmium Acetate
- Holmium(III) Acetate Monohydrate
- Holmium Acetate Solution
- Holmium Aluminide
- Holmium Arsenate
- Holmium Boride
- Holmium Bromide
- Holmium Bromide Hydrate
- Holmium Bromide, Ultra Dry
- Holmium Carbide
- Holmium Carbonate
- Holmium Chloride
- Holmium(III) Chloride Hexahydrate
- Holmium Chloride Solution
- Holmium Fluoride
- Holmium Hydride HoH2
- Holmium Hydride HoH3
- Holmium(III) Hydroxide
- Holmium Iodide
- Holmium Iodide, Ultra Dry
- Holmium Nitrate
- Holmium(III) Nitrate Hexahydrate
- Holmium Nitrate Solution
- Holmium Nitride
- Holmium(III) Oxalate Hydrate
- Holmium(III) Oxalate Decahydrate
- Holmium Oxide
- Holmium Perchlorate Solution
- Holmium(III) Phosphate
- Holmium(III) Sulfate Octahydrate
- Holmium Sulfate
- Holmium Sulfate Solution
- Holmium Sulfide
Metallic Forms
- Holmium Balls
- Holmium Bands
- Holmium Bars
- Holmium Chips
- Holmium Chunk
- Holmium Coil
- Holmium Concentrate
- Holmium Cylinder
- Holmium Disc
- Holmium Flake
- Holmium Flanges
- Holmium Foil
- Holmium Granules
- Holmium Ingot
- Holmium Lump
- Holmium Mesh
- Holmium Metal
- Holmium Microfoil
- Holmium Microleaf
- Holmium Particles
- Holmium Parts
- Holmium Pellets
- Holmium Pieces
- Holmium Plates
- Holmium Powder
- Holmium Puck
- Holmium Ribbon
- Holmium Rings
- Holmium Rod
- Holmium Samples
- Holmium Shaving
- Holmium Sheets
- Holmium Shot
- Holmium Single Crystal
- Holmium Sleeves
- Holmium Slugs
- Holmium Specimens
- Holmium Spheres
- Holmium Spring
- Holmium Strip
- Holmium Tape
- Holmium Tube
- Holmium Wafer
- Holmium Wire
- Ultra Thin Holmium Foil
Oxide Forms
Organometallics
- Holmium Acetylacetonate
- Holmium(III) Acetylacetonate Hydrate
- Holmium Trifluoromethanesulfonate
- Holmium(III) tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate)
- Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)holmium(III)
- Tris(cyclopentadienyl)holmium(III)
- Tris[N,N-bis(trimethylsilyl)amide]holmium(III)
Nanomaterials
Semiconductor & Optical
Sputtering Targets
- Holmium Barium Copper Oxide Sputtering Target
- Holmium Copper Sputtering Target
- Holmium Fluoride Sputtering Target
- Holmium Molybdenum Sputtering Target
- Holmium Oxide Rotatable Sputtering Target
- Holmium Oxide Sputtering Target
- Holmium Phosphide Sputtering Targets
- Holmium Rotatable Sputtering Target
- Holmium Selenide Sputtering Target
- Holmium Sputtering Target
- Holmium Telluride Sputtering Target
- Holmium Zirconium Sputtering Target
Holmium has the highest magnetic moment (10.6µB) of any naturally occurring element. Because of this, it has been used to create the strongest known magnetic fields by placing it within high-strength magnets as a pole piece or magnetic flux concentrator. This magnetic property is also exploited in holmium-yttrium iron garnet, a synthetic ferrimagnetic material used in microwave and magnetooptical applications. Holmium lases at a human eye-safe 2.08 microns, allowing its use in a variety of medical and dental applications in both yttrium-aluminum-garnet (YAG) and yttrium-lanthanum-fluoride (YLF) solid state lasers. The wavelength allows for use in silica fibers designed for shorter wavelengths while still providing the cutting strength of longer wave length equipment. Holmium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Holmium oxides are available in powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Holmium fluoride is another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Holmium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.
Holmium Properties
Holmium is a Block F, Group 3, Period 6 element. The number of electrons in each of Holmium's shells is 2, 8, 18, 29, 8, 2 and its electronic configuration is [Xe] 4f11 6s2. In its elemental form, CAS 7440-60-0, holmium has a silvery white appearance. The holmium atom has a radius of 174.3.pm and its Van der Waals radius is unknown. Holmium was first discovered by J.L. Soret in 1878.
General Properties
Symbol: | Ho |
---|---|
Atomic Number: | 67 |
Atomic Weight: | 164.93 |
Element Category: | Lanthanide |
Group, Period, Block: | n/a, 6, f |
Color: | silvery-white |
Other Names: | Olmio, Hólmio |
Physical Properties
Melting Point: | 1472°C, 2681.6°F, 1745.15 K |
---|---|
Boiling Point: | 2700°C, 4892°F, 2973.15 K |
Density: | 8.795 g/cm3 |
Liquid Density @ Melting Point: | 8.34 g/cm3 |
Density @ 20°C: | 8.80 g/cm3 |
Density of Solid: | 8795 kg·m3 |
Specific Heat: | 0.0393 Cal/g/ K @ 25 °C |
Superconductivity Temperature: | N/A |
Triple Point: | N/A |
Critical Point: | N/A |
Heat of Fusion (kJ·mol-1): | 17.2 |
Heat of Vaporization (kJ·mol-1): | 303 |
Heat of Atomization (kJ·mol-1): | 302.63 |
Thermal Conductivity: | 0.162 W/cm/ K @ 298.2 K |
Thermal Expansion: | (r.t.) (poly) 11.2 µm/(m·K) |
Electrical Resistivity: | 87.0 nΩ-cm @ 25°C |
Tensile Strength: | N/A |
Molar Heat Capacity: | 27.15 J·mol-1·K-1 |
Young's Modulus: | 64.8 GPa |
Shear Modulus: | 26.3 GPa |
Bulk Modulus: | 40.2 GPa |
Poisson Ratio: | 0.231 |
Mohs Hardness: | N/A |
Vickers Hardness: | 481 MPa |
Brinell Hardness: | 746 MPa |
Speed of Sound: | (20 °C) 2760 m·s-1 |
Pauling Electronegativity: | 1.23 |
Sanderson Electronegativity: | N/A |
Allred Rochow Electronegativity: | 1.1 |
Mulliken-Jaffe Electronegativity: | N/A |
Allen Electronegativity: | N/A |
Pauling Electropositivity: | 2.77 |
Reflectivity (%): | N/A |
Refractive Index: | N/A |
Chemical Properties
Electrons: | 67 |
---|---|
Protons: | 67 |
Neutrons: | 98 |
Electron Configuration: | [Xe] 4f11 6s2 |
Atomic Radius: | 176 pm |
Atomic Radius, non-bonded (Å): | 2.3 |
Covalent Radius: | 192±7 pm |
Covalent Radius (Å): | 1.79 |
Van der Waals Radius: | 216 pm |
Oxidation States: | 3, 2, 1 (basic oxide) |
Phase: | Solid |
Crystal Structure: | hexagonal close-packed |
Magnetic Ordering: | paramagnetic |
Electron Affinity (kJ·mol-1) | Unknown |
1st Ionization Energy: | 580.99 kJ·mol-1 |
2nd Ionization Energy: | 1138.54 kJ·mol-1 |
3rd Ionization Energy: | 2203.74 kJ·mol-1 |
Identifiers
CAS Number: | 7440-60-0 |
---|---|
EC Number: | 231-169-0 |
MDL Number: | MFCD00011049 |
Beilstein Number: | N/A |
SMILES Identifier: | [Ho] |
InChI Identifier: | InChI=1S/Ho |
InChI Key: | KJZYNXUDTRRSPN-UHFFFAOYSA-N |
PubChem CID: | 23988 |
ChemSpider ID: | 22424 |
Abundance
Earth - Total: | 80 ppb |
---|---|
Mercury - Total: | 61 ppb |
Venus - Total: | 84 ppb |
Earth - Seawater (Oceans), ppb by weight: | 0.00022 |
Earth - Seawater (Oceans), ppb by atoms: | 0.000008 |
Earth - Crust (Crustal Rocks), ppb by weight: | 1200 |
Earth - Crust (Crustal Rocks), ppb by atoms: | 150 |
Sun - Total, ppb by weight: | N/A |
Sun - Total, ppb by atoms: | N/A |
Stream, ppb by weight: | 0.01 |
Stream, ppb by atoms: | 0.0001 |
Meterorite (Carbonaceous), ppb by weight: | 60 |
Meterorite (Carbonaceous), ppb by atoms: | 7 |
Typical Human Body, ppb by weight: | N/A |
Typical Human Body, ppb by atom: | N/A |
Universe, ppb by weight: | 0.5 |
Universe, ppb by atom: | 0.004 |
History
Discovered By: | Marc Delafontaine |
---|---|
Discovery Date: | 1878 |
First Isolation: | N/A |
Health, Safety & Transportation Information for Holmium
Holmium is slightly toxic in its elemental form. Safety data for Holmium and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the Products tab.
Review and Print SDS for Holmium Metal
SAFETY DATA SHEET
SECTION 1. IDENTIFICATION
Product Name: Holmium Metal
Product Number: All applicable American Elements product codes, e.g. HO-M-02, HO-M-03, HO-M-04, HO-M-05
CAS #: 7440-60-0
Relevant identified uses of the substance: Scientific research and development
Supplier details:
American Elements
1093 Broxton Ave. Suite 2000
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351
Emergency telephone number:
Domestic, North America +1 800-424-9300
International +1 703-527-3887
SECTION 2. HAZARDS IDENTIFICATION
Classification of the substance or mixture in accordance with 29 CFR 1910 (OSHA HCS)
The substance is not classified according
to the Globally Harmonized System (GHS).
Hazards not otherwise classified
No information known.
Label elements
GHS label elements
Not applicable
Hazard pictograms
Not applicable
Signal word
Not applicable
Hazard statements
Not applicable
WHMIS classification
Not controlled
Classification system
HMIS ratings (scale 0-4)
(Hazardous Materials Identification System)
HEALTH
FIRE
REACTIVITY
0
0
0
Health (acute effects) = 0
Flammability = 0
Physical Hazard = 0
Other hazards
Results of PBT and vPvB assessment
PBT:
Not applicable.
vPvB:
Not applicable.
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Chemical characterization: Substances
CAS# Description:
7440-60-0 Holmium
Identification number(s):
EC number:
231-169-0
SECTION 4. FIRST AID MEASURES
Description of first aid measures
After inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm.
Seek immediate medical advice.
After skin contact
Immediately wash with water and soap and rinse thoroughly.
Seek immediate medical advice.
After eye contact
Rinse opened eye for several minutes under running water. Then consult a doctor.
After swallowing
Seek medical treatment.
Information for doctor
Most important symptoms and effects, both acute and delayed
No further relevant information available.
Indication of any immediate medical attention and special treatment needed
No further relevant information available.
SECTION 5. FIREFIGHTING MEASURES
Extinguishing media
Suitable extinguishing agents
Special powder for metal fires. Do not use water.
For safety reasons unsuitable extinguishing agents
Water
Special hazards arising from the substance or mixture
If this product is involved in a fire, the following can be released:
Metal oxide fume
Advice for firefighters
Protective equipment:
No special measures required.
SECTION 6. ACCIDENTAL RELEASE MEASURES
Personal precautions, protective equipment and emergency procedures
Not required.
Environmental precautions:
Do not allow material to be released to the environment without proper governmental permits.
Methods and material for containment and cleaning up:
Pick up mechanically.
Prevention of secondary hazards:
No special measures required.
Reference to other sections
See Section 7 for information on safe handling
See Section 8 for information on personal protection equipment.
See Section 13 for disposal information.
SECTION 7. HANDLING AND STORAGE
Handling
Precautions for safe handling
Keep container tightly sealed.
Store in cool, dry place in tightly closed containers.
Information about protection against explosions and fires:
No special measures required.
Conditions for safe storage, including any incompatibilities
Storage
Requirements to be met by storerooms and receptacles:
No special requirements.
Information about storage in one common storage facility:
Not required.
Further information about storage conditions:
Keep container tightly sealed.
Store in cool, dry conditions in well sealed containers.
Specific end use(s)
No further relevant information available.
SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Additional information about design of technical systems:
No further data; see section 7.
Control parameters
Components with limit values that require monitoring at the workplace:
Not required.
Additional information:
No data
Exposure controls
Personal protective equipment
General protective and hygienic measures
The usual precautionary measures for handling chemicals should be followed.
Maintain an ergonomically appropriate working environment.
Breathing equipment:
Not required.
Protection of hands:
Not required.
Penetration time of glove material (in minutes)
Not determined
Eye protection:
Safety glasses
Body protection:
Protective work clothing.
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Information on basic physical and chemical properties
General Information
Appearance:
Form: Solid in various forms
Color: Not determined
Odor: Not determined
Odor threshold: Not determined.
pH-value: Not applicable.
Change in condition
Melting point/Melting range: 1474 °C (2685 °F)
Boiling point/Boiling range: 2295 °C (4163 °F)
Sublimation temperature / start: Not determined
Flammability (solid, gaseous)
Not determined.
Ignition temperature: Not determined
Decomposition temperature: Not determined
Auto igniting: Not determined.
Danger of explosion: Product does not present an explosion hazard.
Explosion limits:
Lower: Not determined
Upper: Not determined
Vapor pressure at 20 °C (68 °F): 0 hPa
Density at 20 °C (68 °F): 8.795 g/cm³ (73.394 lbs/gal)
Relative density
Not determined.
Vapor density
Not applicable.
Evaporation rate
Not applicable.
Solubility in / Miscibility with Water: Not determined
Partition coefficient (n-octanol/water): Not determined.
Viscosity:
dynamic: Not applicable.
kinematic: Not applicable.
Other information
No further relevant information available.
SECTION 10. STABILITY AND REACTIVITY
Reactivity
No information known.
Chemical stability
Stable under recommended storage conditions.
Thermal decomposition / conditions to be avoided:
Decomposition will not occur if used and stored according to specifications.
Possibility of hazardous reactions
No dangerous reactions known
Conditions to avoid
No further relevant information available.
Incompatible materials:
No information known.
Hazardous decomposition products:
Metal oxide fume
SECTION 11. TOXICOLOGICAL INFORMATION
Information on toxicological effects
Acute toxicity:
No effects known.
LD/LC50 values that are relevant for classification:
No data
Skin irritation or corrosion:
Powder: irritant effect
Eye irritation or corrosion:
Powder: irritant effect
Sensitization:
No sensitizing effects known.
Germ cell mutagenicity:
No effects known.
Carcinogenicity:
No classification data on carcinogenic properties of this material is available from the EPA, IARC, NTP, OSHA or ACGIH.
Reproductive toxicity:
No effects known.
Specific target organ system toxicity - repeated exposure:
No effects known
Specific target organ system toxicity - single exposure:
No effects known.
Aspiration hazard:
No effects known.
Subacute to chronic toxicity:
Lanthanons can cause delayed blood clotting leading to hemorrhages.
Exposure may also lead to sensitivity to heat, itching, increased awareness of odor and taste,
and liver damage.
Subacute to chronic toxicity:
No effects known.
Additional toxicological information:
To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.
SECTION 12. ECOLOGICAL INFORMATION
Toxicity
Aquatic toxicity:
No further relevant information available.
Persistence and degradability
No further relevant information available.
Bioaccumulative potential
No further relevant information available.
Mobility in soil
No further relevant information available.
Additional ecological information:
General notes:
Do not allow material to be released to the environment without proper governmental permits.
Do not allow undiluted product or large quantities to reach ground water, water course or sewage system.
Avoid transfer into the environment.
Results of PBT and vPvB assessment
PBT:
Not applicable.
vPvB:
Not applicable.
Other adverse effects
No further relevant information available.
SECTION 13. DISPOSAL CONSIDERATIONS
Waste treatment methods
Recommendation
Consult state, local or national regulations to ensure proper disposal.
Uncleaned packagings:
Recommendation:
Disposal must be made according to official regulations.
SECTION 14. TRANSPORT INFORMATION
Not a hazardous material for transportation.
UN-Number
DOT, IMDG, IATA
None
UN proper shipping name
DOT, IMDG, IATA
None
Transport hazard class(es)
DOT, ADR, IMDG, IATA
Class
None
Packing group
DOT, IMDG, IATA
None
Environmental hazards:
Not applicable.
Special precautions for user
Not applicable.
Transport in bulk according to Annex II of MARPOL73/78 and the IBC Code
Not applicable.
Transport/Additional information:
Not dangerous according to
the above specifications.
DOT
Marine Pollutant (DOT):
No
SECTION 15. REGULATORY INFORMATION
Safety, health and environmental regulations/legislation specific for the substance or mixture
GHS label elements
Not applicable
Hazard pictograms
Not applicable
Signal word
Not applicable
Hazard statements
Not applicable
National regulations
All components of this product are listed in the U.S. Environmental Protection Agency Toxic Substances Control Act Chemical substance Inventory.
All components of this product are listed on the Canadian Non-Domestic Substances List (NDSL).
SARA Section 313 (specific toxic chemical listings)
Substance is not listed.
California Proposition 65
Prop 65 - Chemicals known to cause cancer
Substance is not listed.
Prop 65 - Developmental toxicity
Substance is not listed.
Prop 65 - Developmental toxicity, female
Substance is not listed.
Prop 65 - Developmental toxicity, male
Substance is not listed.
Information about limitation of use:
For use only by technically qualified individuals.
Other regulations, limitations and prohibitive regulations
Substance of Very High Concern (SVHC) according to the REACH Regulations (EC) No. 1907/2006.
Substance is not listed.
The conditions of restrictions according to Article 67 and Annex XVII of the Regulation (EC) No 1907/2006 (REACH) for the manufacturing, placing on the market and use must be observed.
Substance is not listed.
Annex XIV of the REACH Regulations (requiring Authorisation for use)
Substance is not listed.
Chemical safety assessment:
A Chemical Safety Assessment has not been carried out.
16. OTHER INFORMATION
Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2016 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.
Holmium Isotopes
Holmium has one stable isotope: 165Ho.
Nuclide | Isotopic Mass | Half-Life | Mode of Decay | Nuclear Spin | Magnetic Moment | Binding Energy (MeV) | Natural Abundance (% by atom) |
---|---|---|---|---|---|---|---|
140Ho | 139.96854(54)# | 6(3) ms | Unknown | 8+# | N/A | 1093.11 | - |
141Ho | 140.96310(54)# | 4.1(3) ms | Unknown | (7/2-) | N/A | 1101.18 | - |
142Ho | 141.95977(54)# | 400(100) ms | ß+ to 142Dy; p to 141Dy | (6 to 9) | N/A | 1118.58 | - |
143Ho | 142.95461(43)# | 300# ms [>200 ns] | ß+ to 143Dy | 11/2-# | N/A | 1126.66 | - |
144Ho | 143.95148(32)# | 0.7(1) s | ß+ to 144Dy; ß+ + p to 143Tb | N/A | N/A | 1134.74 | - |
145Ho | 144.94720(32)# | 2.4(1) s | ß+ to 145Dy | (11/2-) | N/A | 1152.13 | - |
146Ho | 145.94464(21)# | 3.6(3) s | ß+ to 146Dy; ß+ + p to 145Tb | (10+) | N/A | 1160.21 | - |
147Ho | 146.94006(3) | 5.8(4) s | ß+ to 147Dy; ß+ + p to 146Tb | (11/2-) | N/A | 1168.29 | - |
148Ho | 147.93772(14) | 2.2(11) s | ß+ to 148Dy | (1+) | N/A | 1185.68 | - |
149Ho | 148.933775(20) | 21.1(2) s | ß+ to 149Dy | (11/2-) | N/A | 1193.76 | - |
150Ho | 149.933496(15) | 76.8(18) s | ß+ to 150Dy | 2- | N/A | 1201.84 | - |
151Ho | 150.931688(13) | 35.2(1) s | ß+ to 151Dy; a to 147Tb | 11/2(-) | N/A | 1209.92 | - |
152Ho | 151.931714(15) | 161.8(3) s | ß+ to 152Dy; a to 148Tb | 2- | N/A | 1218 | - |
153Ho | 152.930199(6) | 2.01(3) min | ß+ to 153Dy; a to 149Tb | 11/2- | N/A | 1226.08 | - |
154Ho | 153.930602(9) | 11.76(19) min | ß+ to 154Dy; a to 150Tb | 2- | N/A | 1234.16 | - |
155Ho | 154.929103(19) | 48(1) min | ß+ to 155Dy | 5/2+ | N/A | 1251.55 | - |
156Ho | 155.92984(5) | 56(1) min | ß+ to 156Dy | 4- | N/A | 1259.63 | - |
157Ho | 156.928256(26) | 12.6(2) min | ß+ to 157Dy | 7/2- | N/A | 1267.71 | - |
158Ho | 157.928941(29) | 11.3(4) min | ß+ to 158Dy; a to 154Tb | 5+ | N/A | 1275.79 | - |
159Ho | 158.927712(4) | 33.05(11) min | ß+ to 159Dy | 7/2- | N/A | 1283.87 | - |
160Ho | 159.928729(16) | 25.6(3) min | ß+ to 160Dy | 5+ | N/A | 1291.95 | - |
161Ho | 160.927855(3) | 2.48(5) h | EC to 161Dy | 7/2- | 4.25 | 1300.02 | - |
162Ho | 161.929096(4) | 15.0(10) min | EC to 161Dy | 1+ | N/A | 1308.1 | - |
163Ho | 162.9287339(27) | 4570(25) y | EC to 161Dy | 7/2- | 4.23 | 1316.18 | - |
164Ho | 163.9302335(30) | 29(1) min | EC to 161Dy; ß- to 164Er | 1+ | N/A | 1314.94 | - |
165Ho | 164.9303221(27) | Observationally Stable | - | 7/2- | 4.173 | 1323.02 | 100 |
166Ho | 165.9322842(27) | 26.83(2) h | ß- to 166Er | 0- | N/A | 1331.1 | - |
167Ho | 166.933133(6) | 3.003(18) h | ß- to 167Er | 7/2- | N/A | 1339.18 | - |
168Ho | 167.93552(3) | 2.99(7) min | ß- to 168Er | 3+ | N/A | 1347.26 | - |
169Ho | 168.936872(22) | 4.72(10) min | ß- to 169Er | 7/2- | N/A | 1355.34 | - |
170Ho | 169.93962(5) | 2.76(5) min | ß- to 170Er | 6+# | N/A | 1363.42 | - |
171Ho | 170.94147(64) | 53(2) s | ß- to 171Er | 7/2-# | N/A | 1362.18 | - |
172Ho | 171.94482(43)# | 25(3) s | ß- to 172Er | N/A | N/A | 1370.26 | - |
173Ho | 172.94729(43)# | 10# s | ß- to 173Er | 7/2-# | N/A | 1378.34 | - |
174Ho | 173.95115(54)# | 8# s | Unknown | N/A | N/A | 1377.1 | - |
175Ho | 174.95405(64)# | 5# s | Unknown | 7/2-# | N/A | 1385.18 | - |