General Information:
Chemical Formula:
CaMg4(AsO3)2F4
Composition:
(Molecular Weight = 459.13 gm)
Calcium 8.73 % Ca
Magnesium 21.17 % Mg
Arsenic 32.64 % As
Oxygen 20.91 % O
Fluorine 16.55 % F
Empirical Formula:
CaMg4(AsO3)2F4
Environment:
In a contact zone between granite and dolomite.
IMA Status:
Approved IMA 1976
Locality:
Nanling area, southern China.
Name Origin:
Named after the locality.
Physical Properties:
Color:
brown red or dark brown.
Density:
3.927
Habits:
Tabular - Form dimensions are thin in one direction., ,
Hardness:
2.5 - Finger Nail
Luster:
Vitreous (Glassy)
Streak:
pale yellow
More details...