General Information:
Chemical Formula:U++++(PO4)(OH)·2.5(H2O)
Composition:(Molecular Weight = 395.05 gm)Uranium 60.25 %
U Phosphorus 7.84 %
P Hydrogen 1.53 %
H Oxygen 30.38 %
O Empirical Formula: U(PO4)(OH)·2.5(H2O)
Environment:Found on quartz crystals associated with octahedral pyrite.
Locality:Uzbekistan.
Name Origin:Named for Vyacheslav Gavilovich Melkov (1911-), Russian mineralogist.
Physical Properties: Cleavage:[010] Distinct
Color:green or dark green.
Density:4.9 - 5.01, Average = 4.95
Habits:Spherical - Spherical, rounded aggregates., Aggregates - Made of numerous individual crystals or clusters., Tabular - Form dimensions are thin in one direction.
Streak:green
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