Calcite, Calcium carbonate ( CaCO3 )

Calcite Calcite
Crystal properties  
Crystal Type trigonal
Transmission Range 0.25 ... 2.3 µm
Refractive Index no=1,6654 / ne=1,4898 @ 509 nm
Density 2.711 g/cm3 @ 25 °C
Melting Point 894 °C (decomposes)
Molecular Weight 101.9613
Thermal Expansion 13 × 10–6 / K
Hardness (Knoop) 3 Mohs
Young’s Modulus 69.9 GPa
Shear Modulus 35 GPa
Bulk Modulus 98 GPa
Solubility in Water none
Crystal Structure Single crystal, synthetic
Application polarisers
List of Optical Crystals        
Materials Refractive Index Transmission
Range (mm)
Density
(g/cm³)
Thermal Expansion
Coefficient (10-6/K)
BK7 glass 1.5164 (588 nm) 0.330 – 2.1 2.51 7.5
SF11 glass 1.78472 (588 nm) 0.370 – 2.5 4.74 6.8
F2 glass 1.62004 (588 nm) 0.420 – 2.0 3.61 8.2
Fused Silica 1.4858 (308 nm) 0.185 – 2.5 2.20 0.55
CaF2 1.399 (5.0 mm) 0.170 – 7.8 3.18 18.85
BaF2 1.460 (3.0 um) 0.15 – 12.0 4.88 18.4
Sapphire 1.755 (1.0mm) 0.180 – 4.5 3.98 8.4
Silicon 3.4179 (10mm) 1.200 – 7.0 2.33 4.15
Ge 4.003 (10 mm) 1.900 – 16 5.33 6.1
ZnSe 2.40 (10 mm) 0.630 – 18 5.27 7.8
ZnS 2.2 (10mm) 0.380 –14 4.09 6.5
LiF 1.39 (500 nm) 0.150 – 5.2 2.64 37
KBr 1.526 (10 mm) 0.280 – 22 2.75 43
MgF2 no = 1.3836 ne = 1.3957 (405 nm) 0.130 – 7.0 7.37 a: 13.7
b: 8.48
YVO4 no = 1.9500 ne = 2.1554 (1.3 mm) 0.400 – 5.0 4.22 a: 4.46
b: 11.37
Calcite no = 1.6557 ne = 1.4852 (633 nm) 0.210 – 2.3 2.75 a: 24.39
b: 5.68
Quartz no = 1.5427 ne = 1.5518 (633 nm) 0.200 – 2.3 2.65 7.07
α-BBO no = 1.6749 ne = 1.5555 (532 nm) 0.190 – 3.5 3.85 a: 4.0
c: 36
LiNbO3 no = 2.2863ne = 2.2027 (633 nm) 0.370 – 4.5 4.64 a: 16.7
c: 2.0