General Information:
Chemical Formula:
Al10[(PO4)8.7(SO3OH)1.3]AlF3·30(H2O)
Composition:
(Molecular Weight = 1,783.60 gm)
Aluminum 16.64 % Al
Phosphorus 15.11 % P
Hydrogen 3.43 % H
Sulfur 1.17 % S
Oxygen 60.46 % O
Fluorine 3.20 % F
Empirical Formula:
Al11(PO4)8.7(SO3)0.65(OH)0.65F3·30(H2O)
Environment:
In vanadium-bearing black shales in a Cambrian carbonaceous chert formation.
IMA Status:
Approved IMA (Dana # Added)
Locality:
Northwestern Karatau Range and Zhabagly Mountains, southern Kazakhstan.
Name Origin:
For Dr. Nonna Mikhailovna Mitryaeva (1920-) in recognition of her contributions to the mineralogy of Kazakhstan.
Physical Properties:
Cleavage:
[001] Perfect, [010] Perfect, [100] Good
Color:
colorless or white.
Density:
2.02 - 2.03, Average = 2.02
Diaphaniety:
Transparent
Habits:
Pulverulent - Forms a loose, poorly-coherent powdery mass., Encrustations - Forms crust-like aggregates on matrix., Nodular - Tuberose forms having irregular protuberances over the su rface.
Luster:
Vitreous - Dull
Streak:
white
More details...