Formula: Ca2(Zn,Mn)Fe4(AsO4)4(OH)6.6H2O
Origin of name: after locality Ogdensburg, New Jersey, USA
Crystal system: orthorhombic, pseudohexagonal
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: brownish red, reddish orange
Diaphaneity:
Luster: resinous on cleavage
Habit: crystals platy, 0.1 mm, as incrustations, blades to 1 mm
Hardness: 2
Specific gravity: 2.92 to 3.11
Cleavage: 3; {001} perfect, {010} fair, {100} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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