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Potassium Gadolinium Tungstate (KGW)

CAS #:

Linear Formula:


MDL Number:


EC No.:



Potassium Gadolinium Tungstate (undoped)
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Potassium Gadolinium Tungstate (KGW) Properties

Compound Formula


Molecular Weight



Colorless crystalline solid

Melting Point

1075 °C

Boiling Point



7.27 g/cm3

Refractive Index

ng = 2.061; np = 1.982; nm = 2.010 (1064 nm)

Crystal Phase / Structure


Thermal Conductivity

2.6-3.8 W/m·K

Potassium Gadolinium Tungstate (KGW) Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Transport Information NONH for all modes of transport

About Potassium Gadolinium Tungstate (KGW)

Potassium Gadolinium Tungstate (or KGW) is monoclinic double tungstate crystal used as a laser gain material and for short pulse Raman scattering. KGW single crystals are available in various geometries and dimensions and are available in both coated and uncoated forms. We also produce KGW with rare earth dopants such as Yb:KGW and Nd:KGW American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available. Please request a quote above to receive pricing information based on your specifications.

Potassium Gadolinium Tungstate (KGW) Synonyms

KGW, Gadolinium potassium tungsten oxide, GdKOW

Potassium Gadolinium Tungstate (KGW) Chemical Identifiers

Linear Formula


Pubchem CID


MDL Number


EC No.



gadolinium; oxotungsten; potassium

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements

See more Gadolinium products. Gadolinium (atomic symbol: Gd, atomic number: 64) is a Block F, Group 3, Period 6 element with an atomic radius of 157.25. Gadolinium Bohr ModelThe number of electrons in each of Gadolinium's shells is [2, 8, 18, 25, 9, 2] and its electron configuration is [Xe] 4f7 5d1 6s2. The gadolinium atom has a radius of 180 pm and a Van der Waals radius of 237 pm. Gadolinium was discovered by Jean Charles Galissard de Marignac in 1880 and first isolated by Lecoq de Boisbaudran in 1886. In its elemental form, gadolinium has a silvery-white appearance. Gadolinium is a rare earth or lanthanide element that possesses unique properties advantageous to specialized applications such as semiconductor fabrication and nuclear reactor shielding. Elemental Gadolinium PictureIt is utilized for both its high magnetic moment (7.94μ B) and in phosphors and scintillator crystals. When complexed with EDTA ligands, it is used as an injectable contrast agent for MRIs. The element is named after the Finnish chemist and geologist Johan Gadolin.

Elemental PotassiumSee more Potassium products. Potassium (atomic symbol: K, atomic number: 19) is a Block S, Group 1, Period 4 element with an atomic weight of 39.0983. The number of electrons in each of Potassium's shells is [2, 8, 8, 1] and its electron configuration is [Ar] 4s1. The potassium atom has a radius of 227.2 pm and a Van der Waals radius of 275 pm. Potassium was discovered and first isolated by Sir Humphrey Davy in 1807. Potassium is the seventh most abundant element on earth. It is one of the most reactive and electropositive of all metals and rapidly oxidizes. As with other alkali metals, potassium decomposes in water with the evolution of hydrogen because of its reacts violently with water, it only occurs in nature in ionic salts.Potassium Bohr Model In its elemental form, potassium has a silvery gray metallic appearance, but its compounds (such as potassium hydroxide) are more frequently used in industrial and chemical applications. The origin of the element's name comes from the English word 'potash,' meaning pot ashes, and the Arabic word qali, which means alkali. The symbol K originates from the Latin word kalium.

See more Tungsten products. Tungsten (atomic symbol: W, atomic number: 74) is a Block D, Group 6, Period 6 element with an atomic weight of 183.84. The number of electrons in each of tungsten's shells is [2, 8, 18, 32, 12, 2] and its electron configuration is [Xe] 4f14 5d4 6s2. Tungsten Bohr ModelThe tungsten atom has a radius of 139 pm and a Van der Waals radius of 210 pm. Tungsten was discovered by Torbern Bergman in 1781 and first isolated by Juan José Elhuyar and Fausto Elhuyar in 1783. In its elemental form, tungsten has a grayish white, lustrous appearance. Elemental TungstenTungsten has the highest melting point of all the metallic elements and a density comparable to that or uranium or gold and about 1.7 times that of lead. Tungsten alloys are often used to make filaments and targets of x-ray tubes. It is found in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. In reference to its density, Tungsten gets its name from the Swedish words tung and sten, meaning heavy stone.

Recent Research

Three-color vibrational CARS thermometry of fuel-rich ethylene/air flames using a potassium gadolinium tungstate Raman-active crystal as a source of narrowband probe radiation., Meißner, Christian, Tröger Johannes W., Kozlov Dimitrii N., Beyrau Frank, and Seeger Thomas , Appl Opt, 2017 Apr 10, Volume 56, Issue 11, p.E77-E83, (2017)

Temperature-dependent absorption and emission of potassium double tungstates with high ytterbium content., Yong, Yean-Sheng, Aravazhi Shanmugam, Vázquez-Córdova Sergio A., Carjaval Joan J., Díaz Francesc, Herek Jennifer L., García-Blanco Sonia M., and Pollnau Markus , Opt Express, 2016 Nov 14, Volume 24, Issue 23, p.26825-26837, (2016)

Enhanced Quantum Cutting via Li(+) Doping from a Bi(3+)/Yb(3+)-Codoped Gadolinium Tungstate Phosphor., Yadav, Ran Vijay, Yadav Ram Sagar, Bahadur Amresh, Singh Akhilesh Kumar, and Rai Shyam Bahadur , Inorg Chem, 2016 Nov 07, Volume 55, Issue 21, p.10928-10935, (2016)

Effect of the cation size on the framework structures of magnesium tungstate, A4Mg(WO4)3 (A = Na, K), R2Mg2(WO4)3 (R = Rb, Cs)., Han, Shujuan, Wang Ying, Jing Qun, Wu Hongping, Pan Shilie, and Yang Zhihua , Dalton Trans, 2015 Mar 28, Volume 44, Issue 12, p.5810-7, (2015)

Specific recognition of guanines in non-duplex regions of nucleic acids with potassium tungstate and hydrogen peroxide., Mao, Wuxiang, Xu Xiaowei, He Huan, Huang Rong, Chen Xi, Xiao Heng, Yu Zhenduo, Liu Yi, and Zhou Xiang , Nucleic Acids Res, 2015 Jan, Volume 43, Issue 1, p.e3, (2015)

A Roughness Study of Ytterbium-Doped Potassium Yttrium Tungstate (YB: KYW) Thin-Disk Femtosecond Ablated Dentin., Liu, Jing, Chen Hu, Ge Wenqi, Wang Yongbo, Sun Yuchun, Wang Yong, and Lü Peijun , J Lasers Med Sci, 2014 Winter, Volume 5, Issue 1, p.32-8, (2014)

Novel rattling of K atoms in aluminium-doped defect pyrochlore tungstate., Shoko, Elvis, Kearley Gordon J., Peterson Vanessa K., Mutka Hannu, Koza Michael M., Yamaura Jun-ichi, Hiroi Zenji, and Thorogood Gordon J. , J Phys Condens Matter, 2014 Jul 30, Volume 26, Issue 30, p.305401, (2014)

Ten Good Reasons for the Use of the Tellurium-Centered Anderson-Evans Polyoxotungstate in Protein Crystallography., Bijelic, Aleksandar, and Rompel Annette , Acc Chem Res, 2017 May 31, (2017)

A temperature-resolved assembly of a series of the largest scandium-containing polyoxotungstates., Cai, Zhen-Wen, Yang Tao, Qi Yan-Jie, Li Xin-Xiong, and Zheng Shou-Tian , Dalton Trans, 2017 May 30, Volume 46, Issue 21, p.6848-6852, (2017)

Self-Phase-Matched Second-Harmonic and White-Light Generation in a Biaxial Zinc Tungstate Single Crystal., Osewski, Pawel, Belardini Alessandro, Petronijevic Emilija, Centini Marco, Leahu Grigore, Diduszko Ryszard, Pawlak Dorota A., and Sibilia Concita , Sci Rep, 2017 Mar 24, Volume 7, p.45247, (2017)


June 23, 2017
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