Formula: MnFe2(PO4)2(OH)2.6H2O
Origin of name: for Hugo Strunz, German mineralogist
Crystal system: triclinic
Crystal class: -1
Twinning: on {100}
Unit cell: a = 10.23 Å, b = 9.84 Å, c = 7.29 Å, a = 90.2°, b = 98.4°, g = 117.4°
Colour: straw-yellow to brownish yellow
Diaphaneity:
Luster:
Habit: crystals hair-like or lath-like, tiny, in tufts and felted coatings
Hardness:
Specific gravity: 2.47 to 2.56
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: trimorphous with laueite and stewartite
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