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Aluminocerite-(CeCa)

A valid IMA mineral species
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About Aluminocerite-(CeCa)Hide

Formula:
(Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3
formerly given as:

(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3
Colour:
Pale pink to reddish pink
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
4.675 (Calculated)
Crystal System:
Trigonal
Name:
Al dominant cerite-(Ce)
Isostructural with:
Aluminium-dominant analogue of Cerite-(Ce) and Cerite-(La). Isostructural with phosphates of Whitlockite group.


Unique IdentifiersHide

Mindat ID:
38991
Long-form identifier:
mindat:1:1:38991:2

IMA Classification of Aluminocerite-(CeCa)Hide

Approved
IMA Formula:
(Ce3+6Ca3)◻Al(SiO4)3(SiO3OH)4(OH)3
Approval year:
2007
First published:
2009
Approval history:
name & formula changes: IMA proposals of May 2023

Classification of Aluminocerite-(CeCa)Hide

9.AG.20

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination

Mineral SymbolsHide

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

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

Physical Properties of Aluminocerite-(CeCa)Hide

Vitreous
Transparency:
Translucent
Colour:
Pale pink to reddish pink
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Density:
4.675 g/cm3 (Calculated)

Optical Data of Aluminocerite-(CeCa)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.810 - 1.816 nε = 1.812 - 1.816
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Non-pleochroic

Chemistry of Aluminocerite-(CeCa)Hide

Mindat Formula:
(Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3

formerly given as:

(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3
Element Weights:
Element% weight
Ce49.818 %
O29.391 %
Si11.650 %
Ca7.125 %
Al1.599 %
H0.418 %

Calculated from ideal end-member formula.
Ce
O
Si
Ca
Al
H

Crystallography of Aluminocerite-(CeCa)Hide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3c
Cell Parameters:
a = 10.645 Å, c = 38.019 Å
Ratio:
a:c = 1 : 3.572
Unit Cell V:
3,730.98 ų (Calculated from Unit Cell)
Morphology:
Pseudo-octahedral to rhombohedral crystals. Dominant forms rhombohedron {1011} and pinacoid {0001}.
Twinning:
None observed

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004896Aluminocerite-(CeCa)Nestola F, Guastoni A, Camara F, Secco L, Dal Negro A, Pedron D, Beran A (2009) Aluminocerite-Ce: A new species from Baveno, Italy: Descriptions and crystal-structure determination American Mineralogist 94 487-4932009Ratti quarry, Baveno, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of Aluminocerite-(CeCa)Hide

General Appearance of Type Material:
Holotype: Aggregates of up to 0.2 mm of pseudo-octahedral to rhombohedral crystals, flattened on the c axis. Crystals to 5-10 µm.
Cotype: Aggregates of pseudo-octahedral to rhombohedral crystals, up to 0.8 mm. Crystals to 50 µm.
Place of Conservation of Type Material:
The Museum of Mineralogy of the University of Padova, Italy (holotype, no. MM5200, and cotype, no. MM5549)
Geological Setting of Type Material:
Millimeter-sized secondary cavities hosted in aplite-pegmatite veins and pods within pink granite. Also in in centimeter-sized miarolitic cavities in granite.
Associated Minerals at Type Locality:

Synonyms of Aluminocerite-(CeCa)Hide

Other Language Names for Aluminocerite-(CeCa)Hide

Relationship of Aluminocerite-(CeCa) to other SpeciesHide

Other Members of Cerite Subgroup:
Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c
Ferricerite-(LaCa)(La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c

Common AssociatesHide

Associations Based on Photo Data:
9 photos of Aluminocerite-(CeCa) associated with Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
6 photos of Aluminocerite-(CeCa) associated with WulfenitePb(MoO4)
6 photos of Aluminocerite-(CeCa) associated with Chevkinite-(Ce)Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2
6 photos of Aluminocerite-(CeCa) associated with QuartzSiO2
4 photos of Aluminocerite-(CeCa) associated with AlbiteNa(AlSi3O8)
4 photos of Aluminocerite-(CeCa) associated with Tengerite-(Y)Y2(CO3)3 · 2-3H2O
3 photos of Aluminocerite-(CeCa) associated with Fergusonite-(Y)YNbO4
3 photos of Aluminocerite-(CeCa) associated with FluoriteCaF2
2 photos of Aluminocerite-(CeCa) associated with ZirconZr(SiO4)
2 photos of Aluminocerite-(CeCa) associated with Bastnäsite-(Ce)Ce(CO3)F

Related Minerals - Strunz-mindat GroupingHide

9.AG.Aluminotaipingite-(CeCa)(Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3Trig. 3m : R3c
9.AG.'Ivanyukite-Na-T'Na2Ti4(SiO4)3(OH)O3 · 7H2OTrig. 3m : R3m
9.AG.'Ivanyukite-Na-C'Na2Ti4(SiO4)3(OH)2O2 · 6H2OIso. 43m : P43m
9.AG.EdgrewiteCa9(SiO4)4F2 Mon. 2/m : P21/c
9.AG.02GatedaliteZrMn2+2Mn3+4SiO12Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.05SkogbyiteZr(Mg2Mn3+4)SiO12Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.05'Braunite-II'Ca(Mn3+,Fe)14(SiO4)O20Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.12Taipingite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3Trig. 3m : R3c
9.AG.15ŻabińskiiteCa[Al0.5(Ta,Nb)0.5)]O(SiO4)Tric. 1
9.AG.15TitaniteCaTiO(SiO4)Mon. 2/m : P21/c
9.AG.15VanadomalayaiteCaVO(SiO4)Mon. 2/m : B2/b
9.AG.15Natrotitanite(Na0.5Y0.5)TiO(SiO4)Mon. 2/m : B2/b
9.AG.15MalayaiteCaSnO(SiO4)Mon. 2/m : B2/b
9.AG.20Ferricerite-(LaCa)(La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c
9.AG.20Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3Trig. 3m : R3c
9.AG.20Nipeiite-(Ce)Ce9Fe3+(SiO4)6[SiO3(OH)](OH)3Trig. 3m : R3c
9.AG.25'Yftisite-(Y)'(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm(2/m2/m2/m) : Cmcm
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon. 2/m : P21/c
9.AG.30SitinakiteKNa2Ti4(SiO4)2O5(OH) · 4H2OTet. 4/mmm(4/m2/m2/m) : P42/mcm
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth. mmm(2/m2/m2/m) : Pmma
9.AG.40aNatisiteNa2Ti(SiO4)OTet. 4/mmm(4/m2/m2/m)
9.AG.45Törnebohmite-(Ce)Ce2Al(SiO4)2(OH)Mon. 2/m : P21/c
9.AG.45Törnebohmite-(La)La2Al(SiO4)2(OH)
9.AG.50Ivanyukite-NaNa2Ti4(SiO4)3(OH)2O2 · 6H2OTrig. 3m : R3m
9.AG.50Ivanyukite-KK2Ti4(SiO4)3(OH)2O2 · 9H2OIso. 43m : P43m
9.AG.50Ivanyukite-CuCuTi4(SiO4)3(OH)2O2 · 7H2OIso. 43m : P43m
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5Mon. m
9.AG.50HydroxyledgrewiteCa9(SiO4)4(OH)2 Mon. 2/m : P21/c
9.AG.52Ulfanderssonite-(Ce)(Ce15Ca)Σ16Mg2(SiO4)10(SiO3OH)(OH,F)5Cl3Mon. m : Bm
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth. 222 : P212121
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 222 : P212121
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 42m : I4m2
9.AG.75AfwilliteCa3[SiO4][SiO2(OH)2] · 2H2OMon. m : Bb
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric. 1 : P1
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

Fluorescence of Aluminocerite-(CeCa)Hide

Not fluorescent

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 Aluminocerite-(CeCa)Hide

References for Aluminocerite-(CeCa)Hide

Localities for Aluminocerite-(CeCa)Hide

Showing 10 localities.

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.
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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.
Italy
 
  • Piedmont
    • Cuneo Province
      • Bagnolo Piemonte
G. Blass EDX + PXRD (M.E. Ciriotti 30.06.2010) +1 other reference
G. Blass EDX + PXRD (M.E. Ciriotti 30.06.2010) +1 other reference
    • Verbano-Cusio-Ossola Province
      • Baveno
        • Feriolo
Nestola et al. (2009)
        • Oltrefiume
          • Mount Camoscio
Nestola et al. (2009)
Mongolia
 
  • Khovd Province
    • Myangad District
      • Khaldzan Buragtag massif
Pavel M. Kartashov (n.d.)
Norway
 
  • Nordland
    • Hamarøy
      • Drag
Husdal (2023)
Raade et al. (1990) +1 other reference
Russia
 
  • Irkutsk Oblast
    • Vitim Plateau
      • Biraya and Bya Rivers confluence area (Chara Basin)
        • Biraya Fe-REE ore occurrence
A.A. Konev analytical data
  • Murmansk Oblast
Chakhmouradian et al. (2002)
South Africa
 
  • North West
    • Bojanala Platinum District Municipality
      • Madibeng Local Municipality
        • Brits
Atanasova et al. (2016)
 
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