Perettiite-(Y)
| Perettiite-(Y) | |
|---|---|
 Perettiite inclusion in phenakite | |
| General | |
| Category | Silicate mineral |
| Formula (repeating unit) | Y2Mn4FeSi2B8O24 |
| IMA symbol | Ptt-Y[1] |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pmna |
| Unit cell | a = 12.8252(5) Å, b = 4.6187(2) Å, c = 12.8252(5) Å; Z = 2 |
| Identification | |
| Crystal habit | Microscopic inclusion |
| Cleavage | (010) |
| Mohs scale hardness | 7 |
| Specific gravity | 4.533 |
| References | [2][3][4] |
Perettiite-(Y) is a complex silicate–borate mineral with the formula Y2Mn4FeSi2B8O24.[3] It was first discovered in 2015 by Adolf Peretti of the Gemresearch Swisslab (GRS). It was found as inclusions in a phenakite crystal from Mogok, Myanmar.[5]
Perettiite-(Y) was approved for IMA (International Mineralogical Association) status in 2015.
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Mineralienatlas
- ^ a b Perettiite on Mindat.org
- ^ Rosa Micaela Danisi; Thomas Armbruster; Eugen Libowitzky; Hao A.O. Wang; Detlef Günther; Mariko Nagashima; Eric Reusser; Willy Bieri (2015). "Perettiite-(Y), Y3+2Mn2+4Fe2+[Si2B8O24], a new mineral from Momeik, Myanmar". European Journal of Mineralogy. 27 (6): 793–803. Bibcode:2015EJMin..27..793D. doi:10.1127/ejm/2015/0027-2483.
- ^ GRS - Perettiite – A New Mineral Discovery From Burma