cubic Halides
Halite
NaCl
Crystal Structure
#! Species: Halite
#! System: Cubic (m3m)
#! Habit: Perfect cube
cubic[m3m]:{100}@1.0
cubic
m3m
{100}
Quick Facts
Hardness
2.5
Specific Gravity
2.17
Refractive Index
1.544
Optical Character
Isotropic
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Open in PlaygroundPhysical Properties
Crystal Systemcubic
Hardness (Mohs)2.5
Specific Gravity2.17
CleavagePerfect {100} (three directions at 90 degrees)
FractureConchoidal (rarely seen)
LustreVitreous
Optical Properties
Refractive Index1.544
Optical CharacterIsotropic
PleochroismNone (isotropic)
Colours
ColorlessWhiteBlue (radiation-induced)PinkOrangeYellow
Localities
Worldwide in evaporite depositsPoland (Wieliczka mines)Pakistan (Khewra Salt Mine)Germany (Stassfurt)Utah (USA)Louisiana (USA - salt domes)
Crystal Forms
cubehopper crystals
Notes
Soluble in water; hygroscopic - must be stored in dry conditions; characteristic salty taste
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Open in PlaygroundRelated Minerals
Other minerals in the cubic system
