Cancrinite
| Cancrinite | ||
|---|---|---|
Specific gravity 2.42 – 2.51 | | |
| Optical properties | Uniaxial (+/−) | |
| Refractive index | nω = 1.507 – 1.528 nε = 1.495 – 1.503 | |
| Birefringence | δ = 0.012 – 0.025 | |
| References | [2][3][4] | |
Cancrinite is a complex
hardness of 5–6 and an uneven conchoidal fracture. It is unusual among the silicate minerals in that it will effervesce with hydrochloric acid due to the associated carbonate ions
.
Found originally in 1839 in the
References
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