General Information:
Chemical Formula:
Al4(SO4)(OH)10·5(H2O)
Composition:
(Molecular Weight = 464.14 gm)
Aluminum 23.25 % Al
Hydrogen 4.34 % H
Sulfur 6.91 % S
Oxygen 65.50 % O
Empirical Formula:
Al4(SO4)(OH)10·5(H2O)
Locality:
Baia Sprie, Maramures, Romainia (formerly known as Felsobanya, in Hungary).
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[001] Perfect, [100] Distinct, [010] Distinct
Color:
colorless, yellow, or white.
Density:
2.35
Diaphaniety:
Transparent to Translucent
Habits:
Globular - Spherical, or nearly so, rounded forms (e.g. wavellite)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Aggregates - Made of nume rous individual crystals or clusters.
Hardness:
1.5 - Between Talc and Gypsum
Luster:
Vitreous - Pearly
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