General Information:
Chemical Formula:
(NH4)2Ca(HPO4)2·(H2O)
Composition:
(Molecular Weight = 286.13 gm)
Calcium 14.01 % Ca
Phosphorus 21.65 % P
Hydrogen 4.23 % H
Nitrogen 9.79 % N
Oxygen 50.33 % O
Empirical Formula:
(NH4)2Ca(HPO4)2·(H2O)
Environment:
Found with other salts in the cave floor.
IMA Status:
Approved IMA 1983
Locality:
Petrogale Cave near Mundrabilla Station, WA, Australia.
Name Origin:
Named for the locality.
Physical Properties:
Color:
colorless.
Density:
2.05
Diaphaniety:
Transparent to Translucent
Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
Hardness:
1-2 - Between Talc and Gypsum
Luster:
Earthy (Dull)
Streak:
white
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