Perettiite-(Y)

Perettiite-(Y)
Perettiite inclusion in phenakite
General
CategorySilicate mineral
Formula
(repeating unit)		Y2Mn4FeSi2B8O24
IMA symbolPtt-Y[1]
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPmna
Unit cella = 12.8252(5) Å, b = 4.6187(2) Å, c = 12.8252(5) Å; Z = 2
Identification
Crystal habitMicroscopic inclusion
Cleavage(010)
Mohs scale hardness7
Specific gravity4.533
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.

Perettiite inclusion in a phenakite crystal

References

  1. ^ 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.
  2. ^ Mineralienatlas
  3. ^ a b Perettiite on Mindat.org
  4. ^ 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.
  5. ^ GRS - Perettiite – A New Mineral Discovery From Burma