Formula: NaF
Origin of name: for M. Villiaume, French explorer
Crystal system: Cubic/Isometric
Crystal class: 4/m 3 2/m
Twinning:
Unit cell: a = 4.63 Å
Colour: Red, yellow, lavender pink to light orange
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals minute, massive, granular
Hardness: 2 to 2.5
Specific gravity: 2.79
Cleavage: 1; {001} perfect
Tenacity: Brittle
Streak: Snow-white to pinkish white
Synonyms/varieties:
Comments: Fluorescent dark red to orange and yellow under SW- and LW-UV, soluble in water
| Back to Alphabetical list | Colour photos | Optical properties/Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |