Formula: Ca2(Mg, Fe) (Mg, Fe, Al)4 Be4 (PO4)6 (OH)4.6H2O
Origin of name: Named after Dr. Pier F. Zanazzi (1939-) of the Universita degli Studi di Perugia, in recognition of his studies of the crystal structures and crystal chemistry of minerals.
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 15.874, b = 11.854, c = 6.605, β = 95.35°
Colour: Pale to dark olive-green
Diaphaneity: Transparent to translucent
Luster: Vitreous to slightly pearly
Habit: Barrel-shaped crystals and crystal rosettes to 4 mm, bladed, prismatic, columnar
Hardness: 5
Specific gravity: 2.76
Cleavage: 2; {100} good, {010} distinct
Tenacity: Brittle, uneven
Streak: White
Synonyms/varieties:
Comments:
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