Breyite
Breyite is a high pressure calcium silicate mineral (CaSiO3) found in diamond inclusions. It is the second most abundant inclusion after ferropericlase, for diamonds with a deep Earth origin. Its occurrence can also indicate the host diamond's super-deep origin. This mineral is named after German mineralogist, petrologist and geochemist Gerhard P. Brey.
| Breyite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Ca3.01(2)Si2.98(2)O9 |
| IMA symbol | Byi |
| Crystal system | Triclinic |
| Space group | P1 |
| Unit cell | a0 = 6.6970(4) Å, b0= 9.2986(7) Å, |
| Identification | |
| Colour | colorless |
| Cleavage | not observed |
| Luster | vitreous |
| Density | 3.072 g/cm3 |
| Ultraviolet fluorescence | non-fluorescent |
| References | |
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