Ferro-ferri-hornblende

Ferro-ferri-hornblende
General
Category Inosilicate
Amphibole supergroup
Formula
(repeating unit)		 ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group C2/m
Unit cell a = 9.93, b = 18.22
c = 5.32 [Å], β = 104.86° (approximated)
Identification
References [1][2]

Ferro-ferri-hornblende is an amphibole-supergroup mineral with the formula ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2. It contains essential vacancy (☐). It was discovered in the Traversella mine, Canavese, Torino, Piedmont, Italy.[1]

References

  1. 1 2 Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Pagano, R., and Pagano, A., 2015. Ferro-ferri-hornblende, IMA 2015-054. CNMNC Newsletter No. 27, October 2015, 1227; Mineralogical Magazine 79, 1229–1236
  2. ↑ "Ferro-ferri-hornblende: Ferro-ferri-hornblende mineral information and data". Mindat.org. Retrieved 2016-03-13.


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