Formula: (Fe,Mn)Sn(OH)6
Origin of name: For Jean Bandy (1900-1991), American engineer, who, with her husband Mark Bandy, translated Agricola's "De Natura Fossilium" from original Latin and who donated to the Los Angeles Natural History Museum the collection on one of whose specimens this new mineral was discovered.
Crystal system: Tetragonal
Crystal class: 4/m
Twinning:
Unit cell: a = 7.64 Ǻ, c = 7.64 Ǻ
Colour: Brown-orange
Diaphaneity: Transparent to translucent
Luster: Vitreous-adamtine
Habit: Pseudo-octahedral aggregates to 0.2 mm, striated
Hardness: 3.5
Specific gravity: 4.41
Cleavage: 2; {001} and {100} fair
Tenacity:
Streak: Pale yellow
Synonyms/varieties:
Comments:
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