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Chlormayenite

A valid IMA mineral species

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Photos of Chlormayenite (3)

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Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

Chlormayenite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany

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About ChlormayeniteHide

Mayen

Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany

Formula:

Ca₁₂Al₁₄O₃₂[◻₄Cl₂]

Originally assumed to be Ca₁₂Al₁₄O₃₃.

Colour:

Colorless

Specific Gravity:

2.85 (Calculated)

Crystal System:

Isometric

Member of:

Mayenite Supergroup

Name:

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 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

Mindat ID:

2606

Long-form identifier:

mindat:1:1:2606:8

GUID
(UUID V4):

4244fc8e-6c89-4165-8cf8-ef2d3271aef9

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 (2024):

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
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.

Elements listed:

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

Crystallography of ChlormayeniteHide

Crystal System:

Isometric

Class (H-M):

4 3m - Hextetrahedral

Space Group:

I4 3d

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	Year	Locality	Temp (K)
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	2007	synthetic	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	2007	synthetic	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	2007	synthetic	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	2007	synthetic	293
0010566	Chlormayenite	Bussem W, Eitel A (1936) Die struktur des pentacalciumtrialuminats Zeitschrift fur Kristallographie 95 175-188	1936		293
0017939	Chlormayenite	Buessem W, Eitel A (1936) Die Struktur des Pentacalciumtrialuminats _cod_database_code 1011034 Zeitschrift fur Kristallographie 95 175-188	1936		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	293
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	293
0014739	Chlormayenite	Bartl H, Scheller T (1970) Zur struktur des 12CaO7Al2O3* Neues Jahrbuch fur Mineralogie, Monatshefte 1970 547-552	1970	synthetic	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Chlormayenite'
loop_
_publ_author_name
'Boysen H'
'Lerch M'
'Stys A'
'Senyshyn A'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 63 
_journal_year 2007
_journal_page_first 675
_journal_page_last 682
_publ_section_title
;
 Structure and oxygen mobility in mayenite (Ca12Al14O33): a high-temperature
 neutron powder diffraction study
 Sample: T = 293 K
;
_database_code_amcsd 0009964
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ca6 Al7 O16.753'
_cell_length_a 11.9794
_cell_length_b 11.9794
_cell_length_c 11.9794
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1719.116
_exptl_crystal_density_diffrn      2.694
_symmetry_space_group_name_H-M 'I -4 3 d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
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  '-y,1/2+z,1/2-x'
  '1/2-x,y,-z'
  '-x,1/2+y,1/2-z'
  '1/4+x,3/4-z,1/4-y'
  '3/4+x,1/4-z,3/4-y'
  '1/4+z,3/4-y,1/4-x'
  '3/4+z,1/4-y,3/4-x'
  '1/4+y,3/4-x,1/4-z'
  '3/4+y,1/4-x,3/4-z'
  '1/4+x,1/4+z,1/4+y'
  '3/4+x,3/4+z,3/4+y'
  '1/4+z,1/4+y,1/4+x'
  '3/4+z,3/4+y,3/4+x'
  '1/4+y,1/4+x,1/4+z'
  '3/4+y,3/4+x,3/4+z'
  '-z,1/2-x,y'
  '1/2-z,-x,1/2+y'
  '-y,1/2-z,x'
  '1/2-y,-z,1/2+x'
  '-x,1/2-y,z'
  '1/2-x,-y,1/2+z'
  '1/2+z,1/2-x,-y'
  '+z,-x,1/2-y'
  '1/2+y,1/2-z,-x'
  '+y,-z,1/2-x'
  '1/2+x,1/2-y,-z'
  '+x,-y,1/2-z'
  '3/4-x,3/4+z,1/4-y'
  '1/4-x,1/4+z,3/4-y'
  '3/4-z,3/4+y,1/4-x'
  '1/4-z,1/4+y,3/4-x'
  '3/4-y,3/4+x,1/4-z'
  '1/4-y,1/4+x,3/4-z'
  '3/4-x,1/4-z,1/4+y'
  '1/4-x,3/4-z,3/4+y'
  '3/4-z,1/4-y,1/4+x'
  '1/4-z,3/4-y,3/4+x'
  '3/4-y,1/4-x,1/4+z'
  '1/4-y,3/4-x,3/4+z'
  'z,x,y'
  '1/2+z,1/2+x,1/2+y'
  'y,z,x'
  '1/2+y,1/2+z,1/2+x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ca   0.14320   0.00000   0.25000   0.87500   0.01720
Ca*   0.18670   0.00000   0.25000   0.12500   0.01900
Al1   0.01880   0.01880   0.01880   1.00000   0.00910
Al2   0.87500   0.00000   0.25000   1.00000   0.00710
O1   0.78672   0.09946   0.30708   1.00000   0.01380
O2  -0.06481  -0.06481  -0.06481   1.00000   0.01510
O3   0.37500   0.00000   0.25000   0.25100   0.03600
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ca 0.03200 0.00820 0.01110 0.00000 0.00000 0.00100
Al1 0.00910 0.00910 0.00910 -0.00030 -0.00030 -0.00030
Al2 0.00300 0.00900 0.00900 0.00000 0.00000 0.00000
O1 0.01440 0.01460 0.01230 0.00770 0.00410 0.00110
O2 0.01510 0.01510 0.01510 -0.00230 -0.00230 -0.00230

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:

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

Synonyms of ChlormayeniteHide

Other Language Names for ChlormayeniteHide

German: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 this group:

Chlorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄Cl₂]	Iso. 4 3m : I4 3d
Fluorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄F₂]	Iso. 4 3m : I4 3d
Fluormayenite	Ca₁₂Al₁₄O₃₂F₂	Iso. 4 3m : I4 3d

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/m 3 2/m)
4.CC.	Allendeite	Sc₄Zr₃O₁₂	Trig. 3 : R3
4.CC.	Bitikleite	Ca₃(Sb⁵⁺Sn⁴⁺)[AlO₄]₃	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.	Yttriaite-(Y)	Y₂O₃	Iso. m3 (2/m 3)
4.CC.	Chlorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄Cl₂]	Iso. 4 3m : I4 3d
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/m 3 2/m)
4.CC.	Priscillagrewite-(Y)	(Ca₂Y)Zr₂(AlO₄)₃	Iso.
4.CC.	Saranovskite	SrCaFe²⁺₂(Cr₄Ti₂)Ti₁₂O₃₈	Trig. 3 : R3
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/m 2/m 2/m) : P6₃/mmc
4.CC.05	Chrombismite	Bi³⁺₁₆Cr⁶⁺O₂₇	Iso. m3m (4/m 3 2/m)
4.CC.10	Freudenbergite	Na₂(Ti,Fe)₈O₁₆	Mon.
4.CC.10	Fluormayenite	Ca₁₂Al₁₄O₃₂F₂	Iso. 4 3m : I4 3d
4.CC.10	Fluorkyuygenite	Ca₁₂Al₁₄O₃₂[(H₂O)₄F₂]	Iso. 4 3m : I4 3d
4.CC.15	Grossite	CaAl₄O₇	Mon. 2/m : B2/b
4.CC.17	Goldschmidtite	KNbO₃	Iso. m3m (4/m 3 2/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	Kahlenbergite	KAl₁₁O₁₇	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.22	Gorerite	CaAlFe³⁺₁₁O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.25	Yafsoanite	Ca₃Te⁶⁺₂(ZnO₄)₃	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.25	Nixonite	Na₂Ti₆O₁₃	Mon. 2/m : B2/m
4.CC.30	Latrappite	Ca₂NbFe³⁺O₆	Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30	Lueshite	NaNbO₃	Orth. mmm (2/m 2/m 2/m)
4.CC.30	Natroniobite	NaNbO₃	Mon.
4.CC.30	Perovskite	CaTiO₃	Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30	Barioperovskite	BaTiO₃	Orth. mm2 : Amm2
4.CC.30	Lakargiite	Ca(Zr,Sn,Ti)O₃	Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30	Megawite	CaSnO₃	Orth. mmm (2/m 2/m 2/m) : Pban
4.CC.32	Usturite	Ca₃(Sb⁵⁺Zr)[Fe³⁺O₄]₃	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32	Elbrusite	Ca₃(U⁶⁺_0.5Zr_1.5)[Fe³⁺O₄]₃	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32	Dzhuluite	Ca₃(Sb⁵⁺Sn⁴⁺)[Fe³⁺O₄]₃	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32	Monteneveite	Ca₃Sb⁵⁺₂(Fe³⁺₂Fe²⁺)O₁₂	Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.35	Loparite-(Ce)	(Na,REE)₂Ti₂O₆	Iso. m3m (4/m 3 2/m)
4.CC.35	Macedonite	PbTiO₃	Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.CC.35	Tausonite	SrTiO₃	Iso. 4 3m
4.CC.35	Isolueshite	(Na,La)NbO₃	Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.35	Panguite	(Ti,Al,Sc,Mg,Zr,Ca)_1.8O₃	Orth. mmm (2/m 2/m 2/m) : Pbca
4.CC.37	Pauloabibite	NaNbO₃	Trig. 3 : R3
4.CC.40	Crichtonite	Sr(Mn,Y,U)Fe₂(Ti,Fe,Cr,V)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	Landauite	NaMnZn₂(Ti,Fe)₆Ti₁₂O₃₈	Trig. 3 : R3
4.CC.40	Lindsleyite	(Ba,Sr)(Zr,Ca)(Fe,Mg)₂(Ti,Cr,Fe)₁₈O₃₈	Trig.
4.CC.40	Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈	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	Uhligite	Ca₃(Ti,Al,Zr)₉O₂₀ ?	Iso.
4.CC.40	Dessauite-(Y)	(Sr,Pb)(Y,U)(Ti,Fe³⁺)₂₀O₃₈	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	Gramaccioliite-(Y)	(Pb,Sr)(Y,Mn)Fe³⁺₂(Ti,Fe³⁺)₁₈O₃₈	Trig. 3 : R3
4.CC.45	Diaoyudaoite	NaAl₁₁O₁₇	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Hawthorneite	BaMgTi₃Cr₄Fe²⁺₂Fe³⁺₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Hibonite	CaAl₁₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Lindqvistite	Pb₂Mn²⁺Fe₁₆O₂₇	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Magnetoplumbite	(Pb,Mn)(Fe,Mn)₁₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Plumboferrite	Pb₂(Fe³⁺,Mn²⁺,Mg)₁₁O₁₉	Trig. 3 2 : P3 1 2
4.CC.45	Yimengite	K(Cr,Ti,Fe,Mg)₁₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Haggertyite	BaFe²⁺₄Fe³⁺₂Ti₅MgO₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Nežilovite	PbZn₂Mn⁴⁺₂Fe³⁺₈O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Batiferrite	BaTi₂Fe³⁺₈Fe²⁺₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Chihuahuaite	FeAl₁₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Barioferrite	BaFe³⁺₁₂O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.45	Kangite	(Sc,Ti,Al,Zr,Mg,Ca,◻)₂O₃	Iso. m3 (2/m 3)
4.CC.45	Mizraite-(Ce)	Ce(Al₁₁Mg)O₁₉	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
4.CC.50	Jeppeite	(K,Ba)₂(Ti,Fe)₆O₁₃	Mon. 2/m : B2/m
4.CC.55	Zenzénite	Pb₃Fe³⁺₄Mn⁴⁺₃O₁₅	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mcm
4.CC.60	Mengxianminite (of Huang et al.)	(Ca,Na)₃(Fe,Mn)₂Mg₂(Sn,Zn)₅Al₈O₂₉

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References for ChlormayeniteHide

Reference List:

Büssem, W.; Eitel, A. (1936): The structure of pentacalcium trialuminate. Zeitschrift für Kristallographie - Crystalline Materials, 95, 175-188.

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. N. (1987): Neutron powder diffraction profile refinement studies on Ca11.3Al14O32.3 and CaClO(D0.88H0.12). Acta Chemica Scandinavica, A41, 110-112.

Datta, R. K. (1987): Thermal expansion of calcium aluminate (12CaO..7Al2O3). Journal of the American Ceramic Society 70, C/288-C/291.

Edmonds, R. N.; Majumdar, A. J. (1988): The hydration of calcium aluminate (12CaO.7Al2O3) at different temperatures. Cement and Concrete Research 18, 473-478.

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, C44, 589-92.

Glasser, F. P. (1995): Comments on wadalite, Ca6Al5SiO16Cl3, and the structures of garnet, mayenite and calcium chlorosilicate. Addendum. Acta Crystallographica, C51, 340.

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, 1357-1362.

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

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.

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, T., Tanaka, K., Takenaka, Y., Matsuishi, S., Hosono, H., Kishimoto, S. (2011): Determination of the local structure of a cage with an oxygen ion in Ca12Al14O33. Acta Crystallographica, B67, 193-204.

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.

Weber, S., Schäfer, S., Saccoccio, M., Seidel, K., Kohlmann, H., Gläser, L., Schunk, S.A. (2021): Mayenite-based electride C12A7e−: an innovative synthetic method via plasma arc melting. Materials Chemistry Frontiers: 5: 1301-1314.

pubs.rsc.org (2022) https://pubs.rsc.org/en/content/articlehtml/2021/qm/d0qm00688b

(2023) Chlormayenite. Handbook of Mineralogy. Mineralogical Society of America

Localities for ChlormayeniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- 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	natürliches Vorkommen der Verbindung ... +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-bearing xenolith)	Rüdinger et al. (1993)
ⓘ Xenolith CS-020	Skrzyńska et al. (2023)
Vordereifel Ettringen ⓘ Caspar quarry	EMPA data (personally collected) +8 other references
ⓘ 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 (HaDarom District) Tamar Regional Council ⓘ Hatrurim Basin	Shulamit Gross (1977) +1 other reference
Tel Aviv District ⓘ Ayalon River (Nahal Ayalon)	Shulamit 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)	Shulamit Gross (1977)
Quds Governorate ⓘ Ma'ale Adumim	Shulamit Gross (1977)

Poland
Silesian Voivodeship Siemianowice Śląskie ⓘ Dąbrowka Wielka	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 Donetsk Kalinin coal mine ⓘ Burned coal dumps	Шарыгин (2015)

Chlormayenite

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