Formula: Al11(PO4)9(OH)6.38H2O
Origin of name: after locality Vashegy mine, Comitat Gömör, Hungary
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 10.773, b = 14.991, c = 20.626
Colour: White, pale green to yellow, brownish
Diaphaneity: Subtranslucent to opaque
Luster: Earthy, dull to waxy
Habit: Spherical aggregates with radial fibrous structure, massive, compact to porous
Hardness: 2 to 3
Specific gravity: 1.93 to 1.99
Cleavage: 1; {001} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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