Formula: (K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12
Origin of name: For Lourens Wals, Belgian collector
Crystal system: Hexagonal
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Silver gray to light brownish gray
Diaphaneity: Translucent
Luster: Pearly to dull
Habit: Very thin hexagonal flakes in tiny rosette-like clusters to about 1 mm
Hardness:
Specific gravity: 3.17
Cleavage: 1; {001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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