Formula: (NH4)MgPO4.6H2O
Origin of name: for H. von Struve, Russian geologist
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: colourless, becomes white on dehydration
Diaphaneity: transparent to translucent
Luster: vitreous, dull when dehydrated
Habit: crystals short prismatic, thick tabular, equant, coffin-shaped, wedge-shaped, to 2 cm, distinctly hemimorphic
Hardness: 2
Specific gravity: 1.711
Cleavage: 2; {001} good, {100} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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