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hydrotungstite
hydrotungstite n.
Brit. 
/ˌhʌɪdrə(ʊ)ˈtʌŋstʌɪt/
, /ˌhʌɪdrə(ʊ)ˈtʌŋstʌɪt/U.S. /ˌhaɪdroʊˈtəŋˌstaɪt/
Mineralogy a hydrated tungstic acid, H2WO4.H2O, occurring as minute green tabular crystals./ˌhaɪdroʊˈtəŋˌstaɪt/ΘΚΠ
the world > the earth > minerals > types of mineral > tungstates and molybdates > [noun] > wolframite group
wolfram1757
wolframine1854
hübnerite1867
ferberite1868
megabasite1868
wolframite1868
wolfram-ochre1868
manganowolframite1896
hydrotungstite1940
1940 Kerr & Young in Program & Abstr. 21st Ann. Meeting Min. Soc. Amer. 9 Since this mineral appears to be an intermediate product in the alteration of ferberite to tungstite and since it resembles tungstite in many of its physical properties, the name hydrotungstite is suggested.
1963 Amer. Mineralogist 48 935 A similarity between the x-ray patterns for hydrotungstite (tungstic acid, H2WO4.H2O) and molybdic acid (H2MoO4.H2O).
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