Formula: BaSi2O5·4H2O
Origin of name: Named after locality, Esquire no. 7 claim, along Big Creek, Fresno County, California, USA.
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 5.038, b = 9.024, c = 18.321
Colour: Colourless, white
Diaphaneity: Transparent
Luster: Vitreous
Habit: Tabular, subhedral grains
Hardness: 2-3
Specific gravity: 2.66
Cleavage: [001] perfect, [010] perfect
Tenacity: Brittle
Streak: White
Synonyms/varieties:
Comments:
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