Formula: CaAl3(PO4)2(OH)5 . H2O
Origin of name: For M. Crandall, Jr., American engineer
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell: a = 7.01 Å, c = 16.19 Å
Colour: Yellow, yellowish-white, gray
Diaphaneity:
Luster: Vitreous, dull, chalky
Habit: Crystals trigonal, minute; fibers, rosettes; massive, nodular masses, spherules
Hardness: 5
Specific gravity: 2.78 to 2.92
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties: Calcio-wavellite
Comments:
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