orthorhombic
Celestine
SrSO4
Quick Facts
Hardness
3-3.5
Specific Gravity
3.95-3.97
Refractive Index
1.619-1.632
Crystal Structure
orthorhombic[mmm]:{001}@1.0 + {011}@0.8 + {210}@0.5 + {102}@0.4 orthorhombic
mmm
{001} {011} {210} {102}
Physical Properties
Crystal Systemorthorhombic
Hardness (Mohs)3-3.5
Specific Gravity3.95-3.97
CleavagePerfect {001}, good {210}
FractureUneven
LustreVitreous to pearly
Optical Properties
Refractive Index1.619-1.632
Birefringence0.010-0.011
PleochroismWeak in colored specimens (pale blue shades)
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Open in Playground orthorhombic[mmm]:{001}@1.0 + {011}@0.8 + {210}@0.5 + {102}@0.4 Related Minerals
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