Formula: Mn5(PO4)2[PO3(OH)]2 . 4H2O
Origin of name: After locality; Hureaux quarry, Haute Vienne, France
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 17.42 Ǻ, b = 9.12 Ǻ, c = 9.50 Ǻ, β = 96.7°
Colour: Pale rose, red, yellowish, orange, yellowish to reddish
Diaphaneity:
Luster: Bright vitreous to greasy
Habit: Crystals short to long prismatic, or tabular or equant; massive, compact, scaly, or fibrous
Hardness: 3.5
Specific gravity: 3.191
Cleavage: 1; {100} good
Tenacity: Uneven; brittle
Streak: Nearly white
Synonyms/varieties:
Comments:
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