General Information:
Chemical Formula:Al5(CO3)(OH)13·5(H2O)
Composition:(Molecular Weight = 506.09 gm)Aluminum 26.66 %
AlHydrogen 4.58 %
H Carbon 2.37 %
C Oxygen 66.39 %
O Empirical Formula: Al5(CO3)(OH)13·5(H2O)
Environment:In vertical fissures in sandstone.
Locality:South Bay, Scarborough, England.
Name Origin:Named after the locality.
Physical Properties: Color:white.
Density:1.85 - 2.05, Average = 1.95
Habits:Pseudo Rhombohedral - Crystals show a rhombohedral outline., Platy - Sheet forms (e.g. micas)., Microscopic Crystals - Crystals visible only with microscopes.
Hardness:1-2 - Between Talc and Gypsum
Streak:white
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