General Information:
Chemical Formula:
CaFe+++H6(MoO4)4(PO4)·6(H2O)
Composition:
(Molecular Weight = 938.74 gm)
Calcium 4.27 % Ca
Iron 5.95 % Fe
Molybdenum 40.88 % Mo
Phosphorus 3.30 % P
Hydrogen 1.29 % H
Oxygen 44.31 % O
Empirical Formula:
CaFe3+(MoO4)4(PO4)·6(H2O)
Environment:
Molybdenite-fluorite deposit.
IMA Status:
Approved IMA 1969
Locality:
Shunak Mountains, Kazakhstan.
Name Origin:
Named for Vyacheslav Gavrilovich Melkov (1911-), Russian mineralogist.
Physical Properties:
Cleavage:
[???] Perfect
Color:
brownish yellow or lemon.
Density:
2.971
Habits:
Pulverulent - Forms a loose, poorly-coherent powdery mass., ,
Hardness:
3 - Calcite
Luster:
Earthy (Dull)
Streak:
yellow
More details...