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⇱ Fluormayenite: Mineral information, data and localities.

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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 of chlormayenite and vacancy analogue of fluorkyuygenite.

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 to superconducting. The mayenites represent a group of chemicals known as "salts of an electron", also known as electrides (e.g., Weber et al., 2021).


Unique IdentifiersHide

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Mindat ID:
43883
Long-form identifier:
mindat:1:1:43883:8

IMA Classification of FluormayeniteHide

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Approved
IMA Formula:
Ca12Al14O32[◻4F2]
First published:
2015

Classification of FluormayeniteHide

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4.CC.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
FmyIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of FluormayeniteHide

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

Optical Data of FluormayeniteHide

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Type:
Isotropic
RI values:
n = 1.612(3)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Moderate

Chemistry of FluormayeniteHide

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Mindat Formula:
Ca12Al14O32F2
Element Weights:
Element% weight
O36.345 %
Ca34.142 %
Al26.816 %
F2.697 %

Calculated from ideal end-member formula.
Common Impurities:
Fe(III),Na

Crystallography of FluormayeniteHide

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Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
I43d
Setting:
I43d
Cell Parameters:
a = 11.9894(2) Å
Unit Cell V:
1723.42 ų
Z:
2

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019955FluormayeniteCosta U, Ballirano P (2000) Improved powder X-ray data for the cement phase Ca12Al14O32F2 (C11A7f) Powder Diffraction 15 56-612000synthetic0293
0019956FluormayeniteYu Q, Sugita S, Feng X, Mi J (1997) On the preparation of single crystals of 11CaO*7Al2O3*CaF2 and the confirmation of its crystal structure Cement and Concrete Research 27 1439-14491997synthetic0293
0019954FluormayeniteWilliams P P (1973) Refinement of the structure of 11CaO*7Al2O3*CaF2 Acta Crystallographica B29 1550-1551👁 Image
1973synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
4.895 Å(92)
2.997 Å(47)
2.681 Å(100)
2.447 Å(43)
2.189 Å(41)
1.945 Å(27)
1.663 Å(33)
1.602 Å(37)
Comments:
From Type Description.

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
51 : Pyrometamorphic minerals (see also #54 and #56)<0.36

Type Occurrence of FluormayeniteHide

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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:

Synonyms of FluormayeniteHide

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Other Language Names for FluormayeniteHide

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Relationship of Fluormayenite to other SpeciesHide

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Other Members of Mayenite Supergroup:
ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso. 43m : I43d
ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 43m : I43d
FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso. 43m : I43d

Common AssociatesHide

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Associated Minerals Based on Photo Data:
1 photo of Fluormayenite associated with AriegilatiteBaCa12(SiO4)4(PO4)2F2O
1 photo of Fluormayenite associated with SpurriteCa5(SiO4)2(CO3)
1 photo of Fluormayenite associated with StracheriteBaCa6(SiO4)2[(PO4)(CO3)]2F

Related Minerals - Strunz-mindat GroupingHide

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4.CC.XuiteCa3Fe3+2[(AlO3(OH)]3Iso. m3m(4/m32/m)
4.CC.Yttriaite-(Y)Y2O3Iso. m3(2/m3)
4.CC.AllendeiteSc4Zr3O12Trig. 3 : R3
4.CC.ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso. 43m : I43d
4.CC.OboniobiteMg4Nb2O9Trig. 3m(32/m) : P3c1
4.CC.BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig. 3 : R3
4.CC.MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig. 3 : R3
4.CC.Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig. 3 : R3
4.CC.ShagamiteKFe11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.BitikleiteCa3(Sb5+Sn4+)[AlO4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2Mon. 2/m : B2/m
4.CC.Heamanite-(Ce)(K0.5Ce0.5)TiO3Iso. m3m(4/m32/m)
4.CC.Priscillagrewite-(Y)(Ca2Y)Zr2(AlO4)3Iso.
4.CC.StranditePb3Mn3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) : P63/mcm
4.CC.SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig. 3 : R3
4.CC.05ChrombismiteBi3+16Cr6+O27Iso. m3m(4/m32/m)
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.
4.CC.10FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso. 43m : I43d
4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.17GoldschmidtiteKNbO3Iso. m3m(4/m32/m) : Pm3m
4.CC.20'Unnamed (HBU UK-4)'NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig. 3 : R3
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 43m : I43d
4.CC.20PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 Trig. 3 : R3
4.CC.20Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig. 3 : R3
4.CC.20'UM1987-03-O:FePbTiU'~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig. 3 : R3
4.CC.22GoreriteCaAlFe3+11O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.22KahlenbergiteKAl11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.25HopmanniteBa2(Ti5Fe)O13Mon. 2/m : B2/m
4.CC.25NixoniteNa2Ti6O13Mon. 2/m : B2/m
4.CC.25YafsoaniteCa3Te6+2(ZnO4)3Iso. m3m(4/m32/m) : Ia3d
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30NatroniobiteNaNbO3Mon.
4.CC.30PerovskiteCaTiO3Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm(2/m2/m2/m)
4.CC.30BariolakargiiteBaZrO3Iso. m3m(4/m32/m) : Pm3m
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30MegawiteCaSnO3Orth. mmm(2/m2/m2/m) : Pban
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm(2/m2/m2/m) : Pnma
4.CC.32UsturiteCa3(Sb5+Zr)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.32ElbrusiteCa3(U6+0.5Zr1.5)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.32MonteneveiteCa3Sb5+2(Fe3+2Fe2+)O12Iso. m3m(4/m32/m) : Ia3d
4.CC.32DzhuluiteCa3(Sb5+Sn4+)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.35TausoniteSrTiO3Iso. 43m
4.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) : Pbca
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m(4/m32/m) : Pm3m
4.CC.35MacedonitePbTiO3Tet. 4/mmm(4/m2/m2/m) : P4/nmm
4.CC.37PauloabibiteNaNbO3Trig. 3 : R3
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig. 3 : R3
4.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3 : R3
4.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 : R3
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40'Davidite-(Y)'(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40'Uhligite'Ca3(Ti,Al,Zr)9O20 ?Iso.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.45DiaoyudaoiteNaAl11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45Mizraite-(Ce)Ce(Al11Mg)O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45LindqvistitePb2Mn2+Fe16O27Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HiboniteCaAl12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 Iso. m3(2/m3)
4.CC.45ChihuahuaiteFeAl12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45PlumboferritePb[Fe3+10.67Mn2+0.33Pb]O18.33Trig. 32 : P312
4.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45MagnetoplumbitePbFe3+12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.50JeppeiteK2Ti6O13Mon. 2/m : B2/m
4.CC.55ZenzénitePb3Fe3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) : P63/mcm
4.CC.60'Mengxianminite (of Huang et al.)'(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

Fluorescence of FluormayeniteHide

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Does not show fluorescence

Other InformationHide

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Thermal Behaviour:
molecular water is released at 400oC
Notes:
Raman bands [cm-1]: 320 (ν2 AlO4), 520 (ν4 AlO4); 700, 770 (ν1 AlO4)
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for FluormayeniteHide

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mindat.org URL:
https://www.mindat.org/min-43883.html
Please feel free to link to this page.

References for FluormayeniteHide

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Reference List:

Localities for FluormayeniteHide

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Showing 11 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Germany
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mayen
        • Seekante
Juroszek et al. (Ti 5 Fe)
Israel
  • Southern District
    • Beersheba Subdistrict
      • Tamar Regional Council
        • Hatrurim Basin
Galuskin et al. (2018) +1 other reference
          • Wadi Zohar
Galuskin +1 other reference
        • Naẖal Gorer
Britvin et al. (2025)
Jordan
  • Amman Governorate
    • Transjordan Plateau
      • Daba-Siwaqa complex
        • Hashem region
          • Lisdan-Siwaga Fault
            • Siwaga
Khoury et al. (2015) +2 other references
Sokol +10 other references
Galuskina et al. (2019)
Middle East
Vapnik et al. (2014)
Palestine
  • West Bank
    • Bethlehem Governorate
Galuskina et al. (2019)
    • Quds Governorate
Williams et al. (2013) +1 other reference
Russia
  • Sverdlovsk Oblast
    • Sysertsky District
      • Dvurechensk
Ерохин Ю.В.
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