Formula: AlF3.3H2O
Origin of name: for Philip E. Rosenberg, American geologist
Crystal system: tetragonal
Crystal class: 4/m
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster: vitreous
Habit: radiating tufts of slender tetragonal prisms
Hardness: 3
Specific gravity: 2.101
Cleavage: 1; {001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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