Satpaevite

General Information:
 Chemical Formula:
Al12V++++2V+++++6O37·30(H2O)
 Composition:
(Molecular Weight = 1,863.75 gm)
Aluminum 17.37 % Al
Vanadium 21.87 % V 
Hydrogen 3.24 % H 
Oxygen 57.52 % O 
 Empirical Formula:
Al12V4+2V5+6O37·30(H2O)
 IMA Status:
Approved IMA 1959
 Locality:
Kurumsak, Kara-Tau, Kazakhstan.
 Name Origin:
Named for Kanysh I. Satpaev (1899-1964), Kazakh geologist.
Physical Properties:
 Cleavage:
[???] Perfect, [???] Perfect
 Color:
greenish yellow or dull yellow.
 Density:
2.4
 Habits:
Massive - Lamellar - Distinctly foliated fine-grained forms., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
 Hardness:
1.5 - Between Talc and Gypsum
 Luster:
Pearly
 Streak:
yellow
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