Roggianite

Formula: Ca₂Be(OH)₂Al₂Si₄O₁₃.2.5H₂O

Origin of name: for a. Roggiani, Italian mineralogist

Crystal system: tetragonal

Crystal class: 4/m 2/m 2/m

Twinning:

Unit cell: 

Colour: whitish yellow, white

Diaphaneity: 

Luster: 

Habit: fibrous aggregates, elongated on c-axis

Hardness: 

Specific gravity: 2.02

Cleavage: 1; {110} perfect

Tenacity: 

Streak: 

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