orthorhombic
Aragonite
CaCO3
Quick Facts
Hardness
3.5-4
Specific Gravity
2.93-2.95
Refractive Index
1.530-1.685
Crystal Structure
orthorhombic[mmm]:{110}@1.0 + {010}@0.7 + {011}@0.6 + {021}@0.4 orthorhombic
mmm
{110} {010} {011} {021}
Physical Properties
Crystal Systemorthorhombic
Hardness (Mohs)3.5-4
Specific Gravity2.93-2.95
CleavageGood {010}, poor {110} and {011}
FractureSubconchoidal to splintery
LustreVitreous to resinous
Optical Properties
Refractive Index1.530-1.685
Birefringence0.155
PleochroismNone
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Open in Playground orthorhombic[mmm]:{110}@1.0 + {010}@0.7 + {011}@0.6 + {021}@0.4 Related Minerals
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