Perettiite-(Y)
Appearance
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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Perettiite-Einschluss-in-einem-Phenakit-Kristall-2.jpg/220px-Perettiite-Einschluss-in-einem-Phenakit-Kristall-2.jpg)
References
[edit]- ^ 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