Question

what is the refractive index of calcite crystal ?

Answer 1

Single calcite crystals display an optical property called birefringence (double refraction). ... Between 190 and 1700 nm, the ordinary refractive index varies roughly between 1.9 and 1.5, while the extraordinary refractive index varies between 1.6 and 1.4.

(source - Wikipedia)
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Answer 2

heya your answer!!!
the refractive index of calcite crystal is
between 190 and 1700 NM the refractive index very roughly between 1.9 and 1.5,while the extraordinary refractive index varies between 1.6 and 1.4.calcite, like most carbonates with dissolve with most forms of acids.