Formula: NaBSi2O5(OH)2
Origin of name: for John Searles, California pioneer
Crystal system: monoclinic
Crystal class: 2
Twinning:
Unit cell: a = 7.97 Å, b = 7.05 Å, c = 4.90 Å, b = 94.0°
Colour: colourless
Diaphaneity:
Luster: vitreous, slightly pearly on cleavage
Habit: crystals prismatic, small or large subhedral, fibers, forming spherulites
Hardness: 1
Specific gravity: 2.46
Cleavage: 3; {100} perfect, {-102} and {010} imperfect
Tenacity: brittle
Streak:
Synonyms/varieties:
Comments:
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