Formula: Na4Be2Sn(Si3O9)2.2H2O
Origin of name: for H. Sörensen, Danish geologist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless to pinkish, alters to milky white
Diaphaneity:
Luster: silky
Habit: crystals acicular or elongated tabular, to 10 cm
Hardness: 5.5
Specific gravity: 2.9
Cleavage: 2; distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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