General Information:
Chemical Formula:
Ca(V++++O)2(PO4)2·5(H2O)
Composition:
(Molecular Weight = 453.98 gm)
Calcium 8.83 % Ca
Vanadium 22.44 % V
Phosphorus 13.65 % P
Hydrogen 2.22 % H
Oxygen 52.86 % O
Empirical Formula:
CaV4+2O2(PO4)2·5(H2O)
Environment:
Black, carbonaceous shale.
Locality:
Sincos, Dept. Junin, Peru, about 160 km E of Lima.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[001] Perfect, [100] Distinct, [110] Distinct
Color:
green, yellowish green, olive green, or brownish green.
Density:
2.97
Habits:
Scaly - Morphology like fish scales., Platy - Sheet forms (e.g. micas)., Aggregates - Made of numerous individual crystals or clusters.
Hardness:
1-2 - Between Talc and Gypsum
Luster:
Vitreous - Metallic
Streak:
light green
More details...