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Kerimasite

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Formula:
Ca3Zr2(SiO4)(Fe3+O4)2
Colour:
light to dark brown
Lustre:
Vitreous
Hardness:
7
Specific Gravity:
4.105 (Calculated)
Crystal System:
Isometric
Name:
For the type locality.
Ferric iron analogue of kimzeyite and Zr-analogue of toturite.


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Classification of KerimasiteHide

Approved
Approval Year:
2009
9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination

Physical Properties of KerimasiteHide

Vitreous
Transparency:
Transparent
Colour:
light to dark brown
Hardness:
Hardness:
VHN25=1168 - 1288 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Not observed.
Density:
4.105(1) g/cm3 (Calculated)

Optical Data of KerimasiteHide

Type:
Isotropic
RI values:
n = 1.945(5)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Comments:
yellowish-greenish colour

Chemical Properties of KerimasiteHide

Formula:
Ca3Zr2(SiO4)(Fe3+O4)2
IMA Formula:
Ca3Zr2(SiFe3+2)O12

Crystallography of KerimasiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Ia3d
Setting:
Ia3d
Cell Parameters:
a = 12.549(1) Å
Unit Cell V:
1976.2 ų
Z:
8

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.441 (41)
3.140 (91)
2.808 (70)
2.564 (93)
1.985 (21)
1.741 (26)
1.677 (100)
1.403 (17)

Type Occurrence of KerimasiteHide

General Appearance of Type Material:
subhedral crystals up to 100 µm in calcite carbonatites; euhedral to subhedral crystals up to 180 µm in carbonatite eluvium.
Place of Conservation of Type Material:
Natural History Museum, London, UK [sample K 94-25  catalogue number BM.1995,P6(47) and sample K 22  catalogue number BM.1995,P6(22)]. A polished block with heavy mineral fractions from eluvial deposits that contain kerimasite, samples KZ 2 and LL 4, is
Geological Setting of Type Material:
Calcite carbonatites ; carbonatite eluvium.
Associated Minerals at Type Locality:

Synonyms of KerimasiteHide

Other Language Names for KerimasiteHide

German:Kerimasit
Spanish:Kerimasita

Relationship of Kerimasite to other SpeciesHide

Other Members of this group:
HutcheoniteCa3Ti2(SiAl2)O12Iso. m3m (4/m 3 2/m) : Ia3d
IrinarassiteCa3Sn2Al2SiO12 Iso. m3m (4/m 3 2/m) : Ia3d
KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.
SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3Iso.
ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d

Related Minerals - Nickel-Strunz GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 4 3m : I4 3d
9.AD.05LarniteCa2SiO4Mon.
9.AD.10Calcio-olivineCa2SiO4Orth. mmm (2/m 2/m 2/m)
9.AD.15MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
9.AD.20BredigiteCa7Mg(SiO4)4Orth.
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso.
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25HibschiteCa3Al2(SiO4)3-x(OH)4xIso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HydroandraditeCa3Fe3+2(SiO4)3-x(OH)4x
9.AD.25KatoiteCa3Al2(SiO4)3-x(OH)4x (x = 1.5-3)Iso.
9.AD.25KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.
9.AD.25KnorringiteMg3Cr2(SiO4)3Iso.
9.AD.25MajoriteMg3(Fe2+,Si,Al)2(SiO4)3Iso.
9.AD.25MorimotoiteCa3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3Iso.
9.AD.25PyropeMg3Al2(SiO4)3Iso.
9.AD.25SchorlomiteCa3(Ti,Fe3+)2((Si,Fe3+)O4)3Iso.
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 4 3m : I4 3d
9.AD.25HoltstamiteCa3(Al,Mn3+)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Momoiite(Mn2+,Ca)3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25EltyubyuiteCa12Fe3+10Si4O32Cl6Iso. 4 3m : I4 3d
9.AD.25HutcheoniteCa3Ti2(SiAl2)O12Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.30CoffiniteU(SiO4) · nH2OTet.
9.AD.30HafnonHfSiO4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet.
9.AD.30ZirconZr(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30Stetindite-(Ce)Ce(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.35HuttoniteThSiO4Mon.
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2xMon.
9.AD.40EulytineBi4(SiO4)3Iso. 4 3m : I4 3d
9.AD.45ReiditeZrSiO4Tet. 4/m : I41/a

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.

References for KerimasiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zaitsev, A.N., Williams, C.T., Britvin, S.N., Kuznetsova, I.V., Spratt, J., Petrov, S.V., and Keller, J. (2010): Kerimasite, Ca3Zr2(Fe3+2Si)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine 74(5), 803-820.
Uher, P., Milovská, S., Milovský, R., Koděra, P., Bačík, P., Bilohuščin, V. (2015): Kerimasite, {Ca3}[Zr2]( )O12 garnet from the Vysoká-Zlatno skarn, Štiavnica stratovolcano, Slovakia. Mineralogical Magazine,79, 715-733.

Internet Links for KerimasiteHide

Localities for KerimasiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mayen
        • Ettringen
          • Bellerberg volcano
EMPA data, Sharygin V.V.
in the collection of Christof Schäfer
Galuskin, E.V., Krüger, B., Krüger, H., Blass, G., Widmer, R., Galuskina, I.O. (2016): Wernerkrauseite, CaFe3+2Mn4+O6 - the first non-stoichiometric post-spinel mineral, from Bellerberg volcano, Eifel, Germany. European Journal of Mineralogy, 28, 485-493
    • Vulkaneifel
      • Daun
        • Üdersdorf
Blaß, G. & Kruijen, F. (2014): Die Neuigkeiten aus der Vulkaneifel (2/14). Mineralien-Welt 25 (5), 62-75 (in German).
Russia
 
  • Kabardino-Balkaria
    • Baksan Valley
Galuskin, E.V., Galuskina, I.O., Kusz, J., Gfeller, F., Armbruster, T., Bailau, R., Dulski, M., Gazeev, V.M., Pertsev, N.N., Zadov, A.E., Dzieržanowski, P. (2015): Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, northern Caucasus Kabardino-Balkaria, Russia, a new microporous mayenite supergroup mineral with “zeolitic” H2O. European Journal of Mineralogy. 27, 113-122; Bailau, R., Gałuskin, E. V., Gazeev, V. M., & Gałuskina, I. O. Raman investigation of potential new mineral-Fe 3-analogue of wadalite from calcareous-silicate xenoliths of the Upper Chegem caldera, Northern Caucasus, Russia.
        • Lakargi Mt.
Galuskina, I.O., Krüger, B., Galuskin, E.V. ,Armbruster, T., Gazeev, V.M., Włodyka, R., Dulski, M. & Dzierżanowski, P. (2015): Fluorchegemite, Ca7(SiO4)3F2, a new mineral from the edgrewitebearing endoskarn zone of an altered xenolith in ignimbrites from Upper Chegem Caldera, Northern Caucasus, Kabardina-balkaria, Russia; Occurrence, crystal structure, and new data on the mineral assemblages. Canadian Mineralogist. 53, 325-344.
Galuskin, E.V., Galuskina, I.O., Gazeev, V.M., Dzierżanowski, P., Prusik, K., Pertsev, N.N., Zadov, A.E., Bailau, R., Gurbanov, A.G. (2011): Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75, 2563-2572.
Slovakia
 
  • Banská Bystrica Region
    • Banská Štiavnica Co.
      • Vysoká
Uher P., Koděra P., Ozdín D. (2012): Kerimasit Ca3Zr2(Fe3+2Si)O12-vzácny granát z Ca-Mg skarnovo-porfýrového ložiska Vysoká-Zlatno, štiavnický stratovulkán (stredné Slovensko). Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 20, 1, 59-62.;Uher, P., Milovská, S., Milovský, R., Koděra, P., Bačík, P., Bilohuščin, V. (2015): Kerimasite, {Ca3}[Zr2]( )O12 garnet from the Vysoká-Zlatno skarn, Štiavnica stratovolcano, Slovakia. Mineralogical Magazine,79, 715-733.
Tanzania (TL)
 
  • Arusha Region
Zaitsev, A.N., Williams, C.T., Britvin, S.N., Kuznetsova, I.V., Spratt, J., Petrov, S.V., and Keller, J. (2010): Mineralogical Magazine 74(5), 803-820.
Zaitsev A N, Williams C T, Britvin S N, Kuznetsova I V, Spratt J, Petrov S V, Keller J (2010) Kerimasite, Ca3Zr2(Fe3+2Si)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine 74, 803-820
Zaitsev A N, Williams C T, Britvin S N, Kuznetsova I V, Spratt J, Petrov S V, Keller J (2010) Kerimasite, Ca3Zr2(Fe3+2Si)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine 74, 803-820
Mineral and/or Locality  
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