Formula: Ca Al18 (PO4)12 (OH)20 . 28H2O
Origin of name: For M. Matula, American amateur mineralogist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless to white
Diaphaneity:
Luster: Pearly
Habit: Crystals thin tabular, in rosettes; botryoidal
Hardness: 1
Specific gravity: 2.330
Cleavage: 1; {100} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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