Formula: FePO4 . 3H2O
Origin of name: Named for Laurent Guillaumen de Koninck (1809-1887), Belgian geologist
Crystal system: Tetragonal
Crystal class: Unknown
Twinning:
Unit cell: a = 11.95, c = 14.52
Colour: Yellow
Diaphaneity: Transparent
Luster: Vitreous
Habit: Acicular in small spherical aggregates
Hardness: 3.5
Specific gravity: 2.40
Cleavage: 1; Transverse to elongation
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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