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Fluormayenite

A valid IMA mineral species
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Formula:
Ca12Al14O32F2
Colour:
Colourless
Lustre:
Vitreous
Hardness:
5½ - 6
Crystal System:
Isometric
Name:
For the composition and analogy to chlormayenite
The fluorine analogue ofchlormayenite and vacancy analogue offluorkyuygenite.

The structure is based on microporous tetrahedra framework, with 1/3 of the structural cages are occupied by fluorine.


The mayenite supergroup species (in general, coded as C12A7, or C12A7e-) show unique electrochemichal properties, with some anions in their structure (e.g., oxygen anions) migrating thorough the structure. As such, the mayenites behave as metals even though they are very non-metal in terms of general chemistry. Transitions seen in their structure may be related tosuperconducting. The mayenites represent a group of chemicals known as "salts of an electron", also known aselectrides (e.g., Weber et al., 2021).


IMA Formula:
Ca12Al14O32[◻4F2]
First published:
Type description reference:

Classification of Fluormayenite

Mineral Symbols
Transparency:
Transparent

Colour:
Colourless
Comment:
In places with greenish or yellowish tint
Streak:
White
Hardness:
5½ - 6 onMohs scale
Hardness:
VHN50=771 kg/mm2 - Vickers

Optical Data of Fluormayenite
Common Impurities:
Fe(III),Na

Crystallography of Fluormayenite
General Appearance of Type Material:
Crystals, usually< 20 μm in size.
Place of Conservation of Type Material:
Type material is deposited in the collections of the collections of the Museum of Natural History in Bern, Bernastrasse 5, CH-3005 Bern, Switzerland, catalogue number NMBE- 42094.
Geological Setting of Type Material:
Larnite-rich pyrometamorphic rocks.
Associated Minerals at Type Locality:
AfwilliteBrownmilleriteEttringiteFoshagiteHematite
HillebranditeHydrocalumiteKatoiteLarniteOldhamite
PericlasePortlanditeShulamititeSpinel SubgroupYe'elimite
Reference:
Galuskin, E.V., Gfeller, F., Armbruster, T., Sharygin, V.V., Galuskina, I.O., Krivovichev, S.V., Vapnik, Y., Murashko, M., Dzierżanowski, P., Wirth, R. (2015) Mayenite supergroup, part III: Fluormayenite, Ca12Ala14aO32[□4F2], and fluorkyuygenite, Ca12Al14O32[(H2O)4F2], two new minerals from pyrometamorphic rocks of the Hatrurim Complex, South Levant. European Journal of Mineralogy: 27: 123-136.
Download:
https://rruff.info/rruff_1.0/uploads/EJM27_123.pdf

Synonyms of Fluormayenite

Relationship of Fluormayenite to other Species
Other Members of this group:
ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso.43m :I43d
ChlormayeniteCa12Al14O32[◻4Cl2]Iso.43m :I43d
FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso.43m :I43d

Common AssociatesIso.m3m(4/m32/m)4.CC.Yttriaite-(Y)Y2O3Iso.m3(2/m3)4.CC.AllendeiteSc4Zr3O12Trig.3 :R34.CC.ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso.43m :I43d4.CC.BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig.3 :R34.CC.MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig.3 :R34.CC.Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig.3 :R34.CC.ShagamiteKFe11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.BitikleiteCa3(Sb5+Sn4+)[AlO4]3Iso.m3m(4/m32/m) :Ia3d4.CC.Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2Mon. 2/m :B2/m4.CC.Heamanite-(Ce)(K0.5Ce0.5)TiO3Iso.m3m(4/m32/m)4.CC.Priscillagrewite-(Y)(Ca2Y)Zr2(AlO4)3Iso.4.CC.SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig.3 :R34.CC.05ChrombismiteBi3+16Cr6+O27Iso.m3m(4/m32/m)4.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.4.CC.10FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso.43m :I43d4.CC.15GrossiteCaAl4O7Mon. 2/m :B2/b4.CC.17GoldschmidtiteKNbO3Iso.m3m(4/m32/m) :Pm3m4.CC.20Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig.3 :R34.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso.43m :I43d4.CC.20PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38Trig.3 :R34.CC.20Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig.3 :R34.CC.20UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig.3 :R34.CC.22GoreriteCaAlFe3+11O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.22KahlenbergiteKAl11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.25NixoniteNa2Ti6O13Mon. 2/m :B2/m4.CC.25YafsoaniteCa3Te6+2(ZnO4)3Iso.m3m(4/m32/m) :Ia3d4.CC.30LatrappiteCa2NbFe3+O6Orth.mmm(2/m2/m2/m) :Pnma4.CC.30NatroniobiteNaNbO3Mon.4.CC.30PerovskiteCaTiO3Orth.mmm(2/m2/m2/m) :Pnma4.CC.30LueshiteNaNbO3Orth.mmm(2/m2/m2/m)4.CC.30BarioperovskiteBaTiO3Orth.mm2 :Amm24.CC.30MegawiteCaSnO3Orth.mmm(2/m2/m2/m) :Pban4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth.mmm(2/m2/m2/m) :Pnma4.CC.32UsturiteCa3(Sb5+Zr)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.32ElbrusiteCa3(U6+0.5Zr1.5)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.32MonteneveiteCa3Sb5+2(Fe3+2Fe2+)O12Iso.m3m(4/m32/m) :Ia3d4.CC.32DzhuluiteCa3(Sb5+Sn4+)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.35TausoniteSrTiO3Iso.43m4.CC.35Loparite(Na,REE)2Ti2O6Iso.m3m(4/m32/m)4.CC.35Panguite(Ti,Al,Sc,Mg,Zr,Ca)1.8O3Orth.mmm(2/m2/m2/m) :Pbca4.CC.35Isolueshite(Na,La)NbO3Iso.m3m(4/m32/m) :Pm3m4.CC.35MacedonitePbTiO3Tet. 4/mmm(4/m2/m2/m) :P4/nmm4.CC.37PauloabibiteNaNbO3Trig. 3 :R34.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig.3 :R34.CC.40Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig.3 :R34.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R34.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig.3 :R34.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R34.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.3 :R34.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 :R34.CC.40Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R34.CC.40Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R34.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.4.CC.40UhligiteCa3(Ti,Al,Zr)9O20 ?Iso.4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig.3 :R34.CC.45DiaoyudaoiteNaAl11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Mizraite-(Ce)Ce(Al11Mg)O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45LindqvistitePb2Mn2+Fe16O27Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HiboniteCaAl12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3Iso.m3(2/m3)4.CC.45ChihuahuaiteFeAl12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 32 :P3124.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13Mon. 2/m :B2/m4.CC.55ZenzénitePb3Fe3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) :P63/mcm4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

Fluorescence of Fluormayenite

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    • References for FluormayeniteⓘHanswilkeite type localityBritvin et al. (2024)doi:10.3390/min8030109.+1 other referenceGaluskin+1 other reference
    Jordan
     
    Khoury et al. (2015)+2 other referencesSokol+10 other referencesGaluskina et al. (2019)
    Middle East
     
    Vapnik et al. (2014)
    Palestine
     
    Galuskina et al. (2019)Williams et al. (2013)+1 other reference
    Russia
     
    Ерохин Ю.В.
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