General Information:
Chemical Formula:
CaMn++Mg2Al2(PO4)4(OH)2·8(H2O)
Composition:
(Molecular Weight = 755.61 gm)
Calcium 5.30 % Ca
Magnesium 6.43 % Mg
Manganese 7.27 % Mn
Aluminum 7.14 % Al
Phosphorus 16.40 % P
Hydrogen 2.40 % H
Oxygen 55.05 % O
Empirical Formula:
CaMn2+Mg2Al2(PO4)4(OH)2·8(H2O)
Environment:
In a pegmatite.
IMA Status:
Approved IMA
Locality:
Tip Top pegmatite, Custer, Custer County, South Dakota, USA.
Name Origin:
Named for John S. White, Jr. (1933-), formaer editor of the Mineralogical Record and professional curator of minerals and gems.
Physical Properties:
Cleavage:
[???] Indistinct
Color:
greenish yellow, yellow, light lilac, or pink.
Density:
2.63
Diaphaniety:
Transparent
Habits:
Tabular - Form dimensions are thin in one direction., Pseudo Hexagonal - Crystals show a hexagonal outline., Aggregates - Made of numerous individual crystals or clusters.
Hardness:
3.5 - Copper Penny
Luster:
Vitreous (Glassy)
Streak:
white
More details...