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

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

↑ ^1.0 ^1.1 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
↑ "Ferro-ferri-hornblende: Ferro-ferri-hornblende mineral information and data". http://www.mindat.org/min-43379.html. Retrieved 2016-03-13.
↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.

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[N-1] 1.0 ^1.1 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". http://www.mindat.org/min-43379.html. Retrieved 2016-03-13.

[3] Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.

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]