Originally named mayenite after the type locality, (near) Mayen, Eifel, Germany. Renamed to chlormayenite in 2013 (IMA 13-C) after the mayenite supergroup was created and the original mayenite was found to contain essential Cl.

Co-Type Localities:

ⓘ Mayener Feld, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
ⓘ Ettringer Feld, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

The Cl analogue of fluormayenite and vacancy analogue of chlorkyuygenite.

The Mayenite Supergroup was revised in 2013 (IMA 13-C); as a consequence, the mineral brearleyite has been discredited as being the same as chlormayenite; mayenite has been redefined and renamed chlormayenite; kyuygenite has been renamed chlorkyuygenite.
See also Galuskin et al. (2009, 2010).

Well-known cement phase.
Note that synthetic pure Ca₁₂Al₁₄O₃₃ is known, but it is stabilised by moisture; the content of water reaches a maximum of 1.3% at ~950 °C and is present as OH groups. The composition of this phase is best described as Ca₁₂Al₁₄O₃₂(OH)₂ (Nurse et al., 1965a,b).

The mayenite supergroup species (in general, coded as C12A7, or C12A7e-) show unique electrochemical properties, with some anions in their structure (e.g., oxygen anions) migrating through 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

Mindat ID:

2606

Long-form identifier:

mindat:1:1:2606:8

IMA Classification of ChlormayeniteHide

IMA status:

Approved

IMA status notes:

Redefined by the IMA

Approval year:

1963

First published:

1964

Classification of ChlormayeniteHide

Strunz-mindat (2026):

4.CC.20

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

Dana 8th ed.:

7.11.3.1

7 : MULTIPLE OXIDES
11 : Miscellaneous

Hey's CIM Ref.:

7.4.13

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths

Mineral SymbolsHide

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

Symbol	Source	Reference for Standard
Cmy	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ChlormayeniteHide

Transparency:

Transparent

Colour:

Colorless

Streak:

White

Density:

2.85 g/cm³ (Calculated)

Optical Data of ChlormayeniteHide

Type:

Isotropic

RI values:

n = 1.600

Birefringence:

Isotropic minerals have no birefringence

Surface Relief:

Moderate

Chemistry of ChlormayeniteHide

Mindat Formula:

Ca₁₂Al₁₄O₃₂[◻₄Cl₂]

Originally assumed to be Ca₁₂Al₁₄O₃₃.

Element Weights:

Element	% weight
O	35.516 %
Ca	33.362 %
Al	26.204 %
Cl	4.919 %

Calculated from ideal end-member formula.

Elements listed:

Al, Ca, Cl, O - search for minerals with similar chemistry

Crystallography of ChlormayeniteHide

Crystal System:

Isometric

Class (H-M):

43m - Hextetrahedral

Space Group:

I43d

Cell Parameters:

a = 11.98 Å

Unit Cell V:

1,719.37 Å³ (Calculated from Unit Cell)

Comment:

Cell parameter ranges from 11.97-12.02 A. Former "chlormayenite" (IMA2010-062) has a = 11.9794 A.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0018992	Chlormayenite	Galuskin E V, Kusz J, Armbruster T, Bailau R, Galuskina I O, Ternes B, Murashko M (2012) A reinvestigation of mayenite from the type locality, the Ettringer Bellerberg volcano near Mayen, Eifel district, Germany Mineralogical Magazine 76 707-716	2012	Ettringer Bellerberg volcano near Mayen, Eifel district, Germany	0	293
0019192	Chlormayenite	Iwata T, Haniuda M, Fukuda K (2008) Crystal structure of Ca12Al14O32Cl2 and luminescence properties of Ca12Al14O32Cl2:Eu2+ Journal of Solid State Chemistry 181 51-55	2008	synthetic	0	293
0009967	Chlormayenite	Boysen H, Lerch M, Stys A, Senyshyn A (2007) Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature neutron powder diffraction study Acta Crystallographica B63 675-682	👁 Image	2007	synthetic	0	293
0009966	Chlormayenite	Boysen H, Lerch M, Stys A, Senyshyn A (2007) Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature neutron powder diffraction study Acta Crystallographica B63 675-682	👁 Image	2007	synthetic	0	293
0009965	Chlormayenite	Boysen H, Lerch M, Stys A, Senyshyn A (2007) Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature neutron powder diffraction study Acta Crystallographica B63 675-682	👁 Image	2007	synthetic	0	293
0009964	Chlormayenite	Boysen H, Lerch M, Stys A, Senyshyn A (2007) Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature neutron powder diffraction study Acta Crystallographica B63 675-682	👁 Image	2007	synthetic	0	293
0014739	Chlormayenite	Bartl H, Scheller T (1970) Zur struktur des 12CaO7Al2O3* Neues Jahrbuch fur Mineralogie, Monatshefte 1970 547-552	1970	synthetic	0	293
0017939	Chlormayenite	Buessem W, Eitel A (1936) Die Struktur des Pentacalciumtrialuminats _cod_database_code 1011034 Zeitschrift fur Kristallographie 95 175-188	👁 Image	1936	0	293
0010566	Chlormayenite	Bussem W, Eitel A (1936) Die struktur des pentacalciumtrialuminats Zeitschrift fur Kristallographie 95 175-188	👁 Image	1936	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.001 Å	(41)
2.685 Å	(100)
2.451 Å	(55)
2.192 Å	(33)
1.947 Å	(24)
1.665 Å	(42)
1.604 Å	(61)
1.310 Å	(22)

Comments:

Data for former "chlormayenite" (IMA2010-062).

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 2: Planetesimal differentiation and alteration	4.566-4.550
6 : Secondary asteroid phases	4.566-4.560
Stage 7: Great Oxidation Event	<2.4
45b : [Other oxidized fumarolic minerals]
47a : [Near-surface hydration of prior minerals]
47g : [Halogen-bearing surface weathering minerals]
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere	<0.6
50 : Coal and/or oil shale minerals	<0.36
51 : Pyrometamorphic minerals (see also #54 and #56)	<0.36
Stage 10b: Anthropogenic minerals	<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)

Type Occurrence of ChlormayeniteHide

Co-Type Localities:

ⓘ Mayener Feld, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
ⓘ Ettringer Feld, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

General Appearance of Type Material:

Colorless rounded grains having no recognizable crystal faces, with a maximum diameter of 60 microns.

Place of Conservation of Type Material:

Mineralogisches Museum, Mineralogisch-Petrographisches Institut, Universität Köln, Germany, M5026,86 (Holotype).
National Museum of Natural History, Washington, D.C., USA, 120045A0 (Type).
National Museum of Natural History, Washington, D.C., USA,, USNM 7590, (Type).

Geological Setting of Type Material:

Thermally metamorphosed marly limestone inclusions in effusive volcanic rocks.

Associated Minerals at Type Locality:

Afwillite	Brownmillerite	Calcite	Diopside	Ettringite
Gehlenite	Grossular	Hydrocalumite	Larnite	Portlandite
Pyrrhotite	Spinel	Wollastonite

Synonyms of ChlormayeniteHide

Other Language Names for ChlormayeniteHide

Dutch:Chlormayeniet

German:Chlormayenit
Mayenit

Russian:Майенит

Simplified Chinese:钙铝石

Spanish:Mayenita

Traditional Chinese:鈣鋁石

Varieties of ChlormayeniteHide

Gallium-bearing Chlormayenite

May bear up to 3.17 wt.% Ga (i.e., max. 4.26 wt.% Ga₂O₃).

Relationship of Chlormayenite to other SpeciesHide

Member of:

Mayenite Supergroup

Other Members of Mayenite Supergroup:

Chlorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄Cl₂]	Iso. 43m : I43d
Fluorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄F₂]	Iso. 43m : I43d
Fluormayenite	Ca₁₂Al₁₄O₃₂F₂	Iso. 43m : I43d

Forms a series with:

Wadalite

Chlormayenite-Wadalite Series

Common AssociatesHide

Associated Minerals Based on Photo Data:

2 photos of Chlormayenite associated with Calcite	CaCO₃
1 photo of Chlormayenite associated with Lakargiite	Ca(Zr,Sn,Ti)O₃
1 photo of Chlormayenite associated with Spurrite	Ca₅(SiO₄)₂(CO₃)

Related Minerals - Strunz-mindat Grouping Hide

4.CC.	Xuite	Ca₃Fe³⁺₂[(AlO₃(OH)]₃	Iso. m3m(4/m32/m)
4.CC.	Yttriaite-(Y)	Y₂O₃	Iso. m3(2/m3)
4.CC.	Allendeite	Sc₄Zr₃O₁₂	Trig. 3 : R3
4.CC.	Chlorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄Cl₂]	Iso. 43m : I43d
4.CC.	Oboniobite	Mg₄Nb₂O₉	Trig. 3m(32/m) : P3c1
4.CC.	Botuobinskite	SrFe²⁺Mg₂(Cr³⁺₆Ti⁴⁺₁₂)[O₃₆(OH)₂]	Trig. 3 : R3
4.CC.	Mirnyite	SrZr⁴⁺Mg₂(Cr³⁺₆Ti⁴⁺₁₂)O₃₈	Trig. 3 : R3
4.CC.	Haitaite-(La)	LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺₄Fe³⁺)O₃₈	Trig. 3 : R3
4.CC.	Shagamite	KFe₁₁O₁₇	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.	Bitikleite	Ca₃(Sb⁵⁺Sn⁴⁺)[AlO₄]₃	Iso. m3m(4/m32/m) : Ia3d
4.CC.	Anzaite-(Ce)	Ce³⁺₄Fe²⁺Ti₆O₁₈ (OH)₂	Mon. 2/m : B2/m
4.CC.	Heamanite-(Ce)	(K_0.5Ce_0.5)TiO₃	Iso. m3m(4/m32/m)
4.CC.	Priscillagrewite-(Y)	(Ca₂Y)Zr₂(AlO₄)₃	Iso.
4.CC.	Strandite	Pb₃Mn³⁺₄Mn⁴⁺₃O₁₅	Hex. 6/mmm(6/m2/m2/m) : P6₃/mcm
4.CC.	Saranovskite	SrCaFe²⁺₂(Cr₄Ti₂)Ti₁₂O₃₈	Trig. 3 : R3
4.CC.05	Chrombismite	Bi³⁺₁₆Cr⁶⁺O₂₇	Iso. m3m(4/m32/m)
4.CC.10	Freudenbergite	Na₂(Ti,Fe)₈O₁₆	Mon.
4.CC.10	Fluormayenite	Ca₁₂Al₁₄O₃₂F₂	Iso. 43m : I43d
4.CC.10	Fluorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄F₂]	Iso. 43m : I43d
4.CC.15	Grossite	CaAl₄O₇	Mon. 2/m : B2/b
4.CC.17	Goldschmidtite	KNbO₃	Iso. m3m(4/m32/m) : Pm3m
4.CC.20	'Unnamed (HBU UK-4)'	NaFe²⁺Zn₂(Ti,Fe³⁺,Nb)₆Ti₁₂O₃₈	Trig. 3 : R3
4.CC.20	Paseroite	PbMn²⁺(Mn²⁺,Fe³⁺)₂(V⁵⁺,Ti,◻)₁₈O₃₈	Trig. 3 : R3
4.CC.20	Mianningite	(◻,Pb,Ce,Na)(U⁴⁺,Mn,U⁶⁺)Fe³⁺₂ (Ti,Fe³⁺)₁₈O₃₈	Trig. 3 : R3
4.CC.20	'UM1987-03-O:FePbTiU'	~(U,Pb)(Ti,Fe³⁺,Fe²⁺,Mn)₂₁O₃₈	Trig. 3 : R3
4.CC.22	Gorerite	CaAlFe³⁺₁₁O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.22	Kahlenbergite	KAl₁₁O₁₇	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.25	Hopmannite	Ba₂(Ti₅Fe)O₁₃	Mon. 2/m : B2/m
4.CC.25	Nixonite	Na₂Ti₆O₁₃	Mon. 2/m : B2/m
4.CC.25	Yafsoanite	Ca₃Te⁶⁺₂(ZnO₄)₃	Iso. m3m(4/m32/m) : Ia3d
4.CC.30	Latrappite	Ca₂NbFe³⁺O₆	Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30	Natroniobite	NaNbO₃	Mon.
4.CC.30	Perovskite	CaTiO₃	Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30	Lueshite	NaNbO₃	Orth. mmm(2/m2/m2/m)
4.CC.30	Bariolakargiite	BaZrO₃	Iso. m3m(4/m32/m) : Pm3m
4.CC.30	Barioperovskite	BaTiO₃	Orth. mm2 : Amm2
4.CC.30	Megawite	CaSnO₃	Orth. mmm(2/m2/m2/m) : Pban
4.CC.30	Lakargiite	Ca(Zr,Sn,Ti)O₃	Orth. mmm(2/m2/m2/m) : Pnma
4.CC.32	Usturite	Ca₃(Sb⁵⁺Zr)[Fe³⁺O₄]₃	Iso. m3m(4/m32/m) : Ia3d
4.CC.32	Elbrusite	Ca₃(U⁶⁺_0.5Zr_1.5)[Fe³⁺O₄]₃	Iso. m3m(4/m32/m) : Ia3d
4.CC.32	Monteneveite	Ca₃Sb⁵⁺₂(Fe³⁺₂Fe²⁺)O₁₂	Iso. m3m(4/m32/m) : Ia3d
4.CC.32	Dzhuluite	Ca₃(Sb⁵⁺Sn⁴⁺)[Fe³⁺O₄]₃	Iso. m3m(4/m32/m) : Ia3d
4.CC.35	Tausonite	SrTiO₃	Iso. 43m
4.CC.35	Loparite	(Na,REE)₂Ti₂O₆	Iso. m3m(4/m32/m)
4.CC.35	Panguite	(Ti,Al,Sc,Mg,Zr,Ca)_1.8O₃	Orth. mmm(2/m2/m2/m) : Pbca
4.CC.35	Isolueshite	(Na,La)NbO₃	Iso. m3m(4/m32/m) : Pm3m
4.CC.35	Macedonite	PbTiO₃	Tet. 4/mmm(4/m2/m2/m) : P4/nmm
4.CC.37	Pauloabibite	NaNbO₃	Trig. 3 : R3
4.CC.40	Landauite	NaMnZn₂(Ti,Fe)₆Ti₁₂O₃₈	Trig. 3 : R3
4.CC.40	Mathiasite	(Mg,Cr,Fe,Ca,K)₂(Ti,Zr,Cr,Fe)₅O₁₂	Trig. 3 : R3
4.CC.40	Senaite	Pb(Mn,Y,U)(Fe,Zn)₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈	Trig. 3 : R3
4.CC.40	Gramaccioliite-(Y)	(Pb,Sr)(Y,Mn)Fe³⁺₂(Ti,Fe³⁺)₁₈O₃₈	Trig. 3 : R3
4.CC.40	Lindsleyite	(Ba,Sr)(Zr,Ca)(Fe,Mg)₂(Ti,Cr,Fe)₁₈O₃₈	Trig.
4.CC.40	Crichtonite	Sr(Mn,Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈	Trig. 3 : R3
4.CC.40	Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈	Trig. 3 : R3
4.CC.40	Cleusonite	(Pb,Sr)(U⁴⁺,U⁶⁺)(Fe²⁺,Zn)₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈	Trig. 3 : R3
4.CC.40	Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈	Trig. 3 : R3
4.CC.40	Davidite-(La)	La(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈	Trig. 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.40	Dessauite-(Y)	(Sr,Pb)(Y,U)(Ti,Fe³⁺)₂₀O₃₈	Trig. 3 : R3
4.CC.45	Diaoyudaoite	NaAl₁₁O₁₇	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Yimengite	K(Cr,Ti,Fe,Mg)₁₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Nežilovite	PbZn₂Mn⁴⁺₂Fe³⁺₈O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Hawthorneite	BaMgTi₃Cr₄Fe²⁺₂Fe³⁺₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Mizraite-(Ce)	Ce(Al₁₁Mg)O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Haggertyite	BaFe²⁺₄Fe³⁺₂Ti₅MgO₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Lindqvistite	Pb₂Mn²⁺Fe₁₆O₂₇	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Hibonite	CaAl₁₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Kangite	(Sc,Ti,Al,Zr,Mg,Ca,◻)₂O₃	Iso. m3(2/m3)
4.CC.45	Chihuahuaite	FeAl₁₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Barioferrite	BaFe³⁺₁₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Plumboferrite	Pb[Fe³⁺_10.67Mn²⁺_0.33Pb]O_18.33	Trig. 32 : P312
4.CC.45	Batiferrite	BaTi₂Fe³⁺₈Fe²⁺₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.45	Magnetoplumbite	PbFe³⁺₁₂O₁₉	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.CC.50	Jeppeite	K₂Ti₆O₁₃	Mon. 2/m : B2/m
4.CC.55	Zenzénite	Pb₃Fe³⁺₄Mn⁴⁺₃O₁₅	Hex. 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

Other InformationHide

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 ChlormayeniteHide

mindat.org URL:

https://www.mindat.org/min-2606.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for ChlormayeniteHide

Reference List:

Büssem, W. (1936) Die Struktur des Pentacalciumtrialuminats. Zeitschrift für Kristallographie, 95 (1-6). 175-188 doi:10.1524/zkri.1936.95.1.175

Hentschel, G. (1964): Mayenit, 12CaO.7Al2O3, und Brownmillerit, 2CaO.(Al,Fe)2O3, zwei neue Minerale in den Kalksteineinschlüssen der Lava des Ettringer Bellerberges: Neues Jahrbuch für Mineralogie, Monatshefte, 1964: 22-29.

Nurse, R. W., Welch, J. H., Majumdar, A. J. (1965 a): The 12CaO.7Al2O3 phase in the CaO-Al2O3 system. Transactions and Journal of the British Ceramic Society, 64, 323-332.

Nurse, R. W.; Welch, J. H.; Majumdar, A. J. (1965 b): The CaO-Al2O3 system in a moisture-free atmosphere. Transactions and Journal of the British Ceramic Society, 64, 409-418.

American Mineralogist (1965): 50: 2106.

Brisi, C., Borlera, M. L. (1983): Excess oxygen in calcium aluminate (12CaO.7Al2O3) and related phases. Cemento 80, 155-164 (in English and Italian).

Christensen, A. Nørlund; Sandström, Magnus; Maartmann-Moe, Knut; Maberg, Otto; Scheie, Alf; Louër, D. (1987) Neutron Powder Diffraction Profile Refinement Studies on Ca11.3Al14O32.3 and CaClO(D0.88H0.12). Acta Chemica Scandinavica, 41a. 110-112 doi:10.3891/acta.chem.scand.41a-0110

Datta, R. K. (1987) Thermal Expansion of 12CaO.7Al₂O₃. Journal of the American Ceramic Society, 70 (10). C/288-C/291 doi:10.1111/j.1151-2916.1987.tb04902.x

Edmonds, R.N.; Majumdar, A.J. (1988) The hydration of 12CaO.7Al2O3 at different temperatures. Cement and Concrete Research, 18 (3). 473-478 doi:10.1016/0008-8846(88)90082-8

Feng, Q. L., Glasser, F. P., Howie, R. A., Lachowski, E. E. (1988) Chlorosilicate with the 12CaO.7Al2O3 structure and its relationship to garnet. Acta Crystallographica Section C Crystal Structure Communications, 44 (4) 589-592 doi:10.1107/s0108270187012046

Glasser, F. P. (1995) Comments on wadalite, Ca6Al5SiO16Cl3, and the structures of garnet, mayenite and calcium chlorosilicate. Addendum. Acta Crystallographica Section C Crystal Structure Communications, 51 (2) 340 doi:10.1107/s0108270195099781

Patsiogiannis, Filippos; Pal, Uday B.; Chou, Kuo-Chih (1996): Incorporation of chlorine in a secondary steelmaking slag based on the CaO-Al2O3-SiO2 system. ISIJ International 36, 1119-1126.

Park, C.-K (1998) Characteristics and hydration of C12−xA7·x(CaF2) (x = 0 ∼ 1.5) minerals. Cement and Concrete Research, 28 (10). 1357-1362 doi:10.1016/s0008-8846(98)00105-7

(2005) Chlormayenite. Handbook of Mineralogy. Mineralogical Society of America

Palacios, Luis, De La Torre, Ángeles G., Bruque, Sebastián, García-Muñoz, Jose L., García-Granda, Santiago, Sheptyakov, Denis, Aranda, Miguel A. G. (2007) Crystal Structures and in-Situ Formation Study of Mayenite Electrides. Inorganic Chemistry, 46 (10) 4167-4176 doi:10.1021/ic0700497

Boysen, H., Lerch, M., Stys, A., Senyshyn, A. (2007) Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature neutron powder diffraction study. Acta Crystallographica Section B Structural Science, 63 (5) 675-682 doi:10.1107/s0108768107030005

Galuskin, Evgeny V., Gazeev, Viktor M., Lazic, Biljana, Armbruster, Thomas, Galuskina, Irina O., Zadov, Aleksander E., Pertsev, Nikolai N., Wrzalik, Roman, Dzierżanowski, Piotr, Gurbanov, Anatoly G., Bzowska, Grażyna (2009) Chegemite Ca₇(SiO₄)₃(OH)₂ a new humite-group calcium mineral from the Northern Caucasus, Kabardino-Balkaria, Russia. European Journal of Mineralogy, 21 (5) 1045-1059 doi:10.1127/0935-1221/2009/0021-1962

Bailau, R., Galuskin, E.V., Gazeev, V.M. & Pertsev, N.N. (2010): Classification and potential new minerals in the “mayenite group”. 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27, CD of Abstracts, p. 493.

Ma, C., Sweeney Smith, S.A., Connolly, H.C., Beckett, J.R., Rossman, G.R., Schrader, D.L. (2010): Discovery of Cl-bearing mayenite, Ca12Al14O32Cl2, a new mineral in a CV3 Meteorite. 73rd Annual Meteoritical Society Meeting, 2010, 5134.pdf.

Ma, C., Connolly, H. C., Beckett, J. R., Tschauner, O., Rossman, G. R., Kampf, A. R., Zega, T. J., Smith, S. A. S., Schrader, D. L. (2011) Brearleyite, Ca12Al14O32Cl2, a new alteration mineral from the NWA 1934 meteorite. American Mineralogist, 96 (8) 1199-1206 doi:10.2138/am.2011.3755

Sakakura, Terutoshi, Tanaka, Kiyoaki, Takenaka, Yasuyuki, Matsuishi, Satoru, Hosono, Hideo, Kishimoto, Shunji (2011) Determination of the local structure of a cage with an oxygen ion in Ca12Al14O33. Acta Crystallographica Section B Structural Science, 67 (3) 193-204 doi:10.1107/s0108768111005179

Galuskin, E. V., Kusz, J., Armbruster, T., Bailau, R., Galuskina, I. O., Ternes, B., Murashko, M. (2012) A reinvestigation of mayenite from the type locality, the Ettringer Bellerberg volcano near Mayen, Eifel district, Germany. Mineralogical Magazine, 76 (3) 707-716 doi:10.1180/minmag.2012.076.3.18

Galuskin, Evgeny, Galuskina, Irina, Vapnik, Yevgeny, Murashko, Mikhail (2020) Molecular Hydrogen in Natural Mayenite. Minerals, 10 (6) 560 doi:10.3390/min10060560

Weber, Sebastian; Schäfer, Sebastian; Saccoccio, Mattia; Seidel, Karsten; Kohlmann, Holger; Gläser, Roger; Schunk, Stephan A. (2021) Mayenite-based electride C12A7e⁻: an innovative synthetic method via plasma arc melting. Materials Chemistry Frontiers, 5 (3). 1301-1314 doi:10.1039/d0qm00688b

Abd-El-Raoof, F., Youssef, H.F., El-Sokkary, T.M., Abd El-Shakour, Z.A., Tawfik, A. (2023) Fabrication and characterization of calcium aluminates cement via microwave-hydrothermal route: Mayenite, katoite, and hydrocalumite. Construction and Building Materials, 401. 132988 doi:10.1016/j.conbuildmat.2023.132988

Localities for ChlormayeniteHide

Showing 31 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

👁 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.

Austria
Styria Südoststeiermark District Klöch ⓘ Basalt quarry	Heritsch (1990) +2 other references
Czech Republic
South Moravian Region Brno-Country District Oslavany ⓘ Rosice-Oslavany coalfield	Hršelová et al. (2013)
Germany (TL)
Rhineland-Palatinate Mayen-Koblenz Mayen ⓘ Mayener Feld (TL)	Hentschel (1964)
Seekante ⓘ Xenolith CS-008 (Bellbergite type-locality)	Rüdinger et al. (1993)
ⓘ Xenolith CS-020	Skrzyńska et al. (2023)
ⓘ Xenolith CS-090 (Hopmannite type locality)	Juroszek et al. (Ti 5 Fe) +1 other reference
Vordereifel Ettringen ⓘ Caspar quarry	EMPA data (personally collected) +8 other references
ⓘ Karlleuite-bearing xenolith	Juroszek et al. (2024)
ⓘ Xenolith CS-033	in the collection of Christof Schäfer
ⓘ Xenolith CS-043	Juroszek et al. (Ti 5 Fe)
ⓘ Xenolith CS-050	in the collection of Christof Schäfer
ⓘ Ettringer Feld (TL)	Hentschel (1964)
Vulkaneifel Daun Üdersdorf ⓘ Emmelberg	Schüller et al. (1986)
Hungary
Pest County Szob District Verőce ⓘ Fenyves Hill	Szakáll et al. (2018)
Israel
Southern District Beersheba Subdistrict Tamar Regional Council ⓘ Hatrurim Basin	Gross (1977) +1 other reference
Tel Aviv District ⓘ Ayalon River (Nahal Ayalon)	Gross (1977)
Jordan
Amman Governorate Transjordan Plateau Daba-Siwaqa complex Hashem region Lisdan-Siwaga Fault ⓘ Jordan Areva Resources	Fleurance et al. (2013)
Siwaga ⓘ Tulul al Hammam	Sokol et al. (2016)
ⓘ Unnamed marble quarries	Sokol +9 other references
Middle East
ⓘ Hatrurim Formation	Gross (1977) +1 other reference
Northwest Africa Meteorites
ⓘ Northwest Africa 1934 meteorite (NWA 1934)	Ma et al. (2011) +2 other references
Palestine
West Bank Hebron Governorate ⓘ Tarqumiya (Tarqumiye)	Gross (1977)
Quds Governorate ⓘ Ma'ale Adumim	Gross (1977)
Poland
Silesian Voivodeship Siemianowice Śląskie ⓘ Dąbrowka Wielka	[var: Gallium-bearing Chlormayenite] Kruszewski (2018)
Russia
Chelyabinsk Oblast ⓘ Baturinskaya-Vostochnaya-1-2 mine	Sharygin (2015)
ⓘ Baturinsky 1 and 2 mines	Zateeva et al. (2007)
ⓘ Chelyabinsk coal basin	Chesnokov (1993) +1 other reference
ⓘ Kopeysk	Cesnokov et al. (1998)
Korkinsky District ⓘ Korkino	Cesnokov et al. (1998)
Ukraine
Donetsk Oblast Gorlovka Kalinin coal mine ⓘ Burned coal dumps	Шарыгин (2015)

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