Vanalite

Formula: NaAl₈V₁₀O₃₈.30H₂O

Origin of name: from vanadium and aluminum in its composition

Crystal system: Monoclinic

Crystal class: 2/m

Twinning:

Unit cell: a = 12.618, b = 10.673, c = 10.932, β = 95.22°

Colour: Bright yellow with orange tint, orange

Diaphaneity: Semitransparent

Luster: Waxy to vitreous

Habit: crystals wedge-shaped, 0.025 mm, poorly formed flattened and ragged crystals

Hardness:  n.d.

Specific gravity: 2.3 to 2.4

Cleavage: 2; {010} perfect, {100}less perfect

Tenacity: 

Streak: Yellow

Synonyms/varieties:

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