General Information:
Chemical Formula:
Ca4Al2.4(OH)12.8(SO4)·6(H2O)
Composition:
(Molecular Weight = 622.52 gm)
Calcium 25.75 % Ca
Aluminum 8.67 % Al
Hydrogen 3.89 % H
Sulfur 5.15 % S
Oxygen 56.54 % O
Empirical Formula:
Ca4Al2(OH)12(SO4)·6(H2O)
Environment:
In carbonaceous xenoliths in a Tertiary basalt. Related to hydrocalumite.
IMA Status:
Approved IMA (Dana # Added)
Locality:
The Zeilberg quarry, Marolsweisach, northern Bavaria, Germany.
Name Origin:
For Prof. Hans Jurgen Kuzel of Erlangen, Germany. Who first synthesized th compound.
Physical Properties:
Color:
white.
Density:
1.99 - 2.02, Average = 2
Diaphaniety:
Transparent
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Platy - Sheet forms (e.g. micas).,
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...