General Information:
Chemical Formula:
(Mn++,Ca)(Fe++,Mn++)Mg2Al2(PO4)4(OH)2·8(H2O)
Composition:
(Molecular Weight = 767.44 gm)
Calcium 1.31 % Ca
Magnesium 6.33 % Mg
Manganese 7.16 % Mn
Aluminum 7.03 % Al
Iron 5.46 % Fe
Phosphorus 16.14 % P
Hydrogen 2.36 % H
Oxygen 54.20 % O
Empirical Formula:
Mn2+0.75Ca0.25Fe2+0.75Mn2+0.25Mg2Al2(PO4)4(OH)2·8(H2O)
Environment:
In pegmatites.
IMA Status:
Approved IMA
Locality:
Ilha de Taquaral, Minas Gerias, Brazil.
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:
[???] Good
Color:
chocolate brown.
Density:
2.63 - 2.67, Average = 2.65
Diaphaniety:
Transparent
Habits:
Aggregates - Made of numerous individual crystals or clusters., ,
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
brownish white
More details...