Formula: MgHPO4.3H2O
Origin of name: for J. Newbery, Australian geologist
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: colourless, grayish or brownish from impurities
Diaphaneity: transparent
Luster: vitreous
Habit: crystals short prismatic, tabular or equant
Hardness: 3 to 3.5
Specific gravity: 2.10
Cleavage: 2; {010} perfect, {001} imperfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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