Villiaumite

Refractive Index : 1.327

Optical Characteristic : SR

Specific Gravity : 2.79

Formula : NaF

Crystal System : Cubic

Variety/Species : All

Species/Group : Villiaumite

Birefringence : Anomalous

Dispersion :

Hardness : 2 to 2.5

Toughness : Poor

Ultrasonic : Never

Steam : Never

UV Long : Inert

UV Short : Inert

Pleochroism : Anomalous

Strength : Strong

Pleochroism Colors : None

Heat : Sensitive

Acids : Sensitive

Light : Stable

Polish Luster : Vitreous

Fracture : Conchoidal

Fracture Luster :

Clarity Type : N/A

Tones : N/A

Saturations : N/A

Cause of Color :

Enhancements : None

Cleavage : Perfect in 1 direction

Color Range : Red, deep carmine-red, lavender pink, pink, orange, (light) reddish, pinkish

Transparency : Transparent to opaque

Phenomena : None

Separations : Villiaumite from-

Identifying Characteristics and information
Brittle.Becomes colorless if heated to 300 degrees C.

Spectral Data
Not diagnostic

Trade Names and Misnomers
Villiaumite

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