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Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. / Zaitsev, A. N.; Williams, C. T.; Britvin, S. N.; Kuznetsova, I. V.; Spratt, J.; Petrov, S. V.; Keller, J.

In: Mineralogical Magazine, Vol. 74, No. 5, 01.10.2010, p. 803-820.

Research output: Contribution to journal › Article › peer-review

Harvard

Zaitsev, AN, Williams, CT, Britvin, SN, Kuznetsova, IV, Spratt, J, Petrov, SV & Keller, J 2010, 'Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania', Mineralogical Magazine, vol. 74, no. 5, pp. 803-820. https://doi.org/10.1180/minmag.2010.074.5.803

APA

Zaitsev, A. N., Williams, C. T., Britvin, S. N., Kuznetsova, I. V., Spratt, J., Petrov, S. V., & Keller, J. (2010). Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine, 74(5), 803-820. https://doi.org/10.1180/minmag.2010.074.5.803

Vancouver

Zaitsev AN, Williams CT, Britvin SN, Kuznetsova IV, Spratt J, Petrov SV et al. Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine. 2010 Oct 1;74(5):803-820. https://doi.org/10.1180/minmag.2010.074.5.803

Author

Zaitsev, A. N. ; Williams, C. T. ; Britvin, S. N. ; Kuznetsova, I. V. ; Spratt, J. ; Petrov, S. V. ; Keller, J. / Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. In: Mineralogical Magazine. 2010 ; Vol. 74, No. 5. pp. 803-820.

BibTeX

@article{ff9f44b7717148c991de90bf546cf0be,
title = "Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania",
abstract = "Kerimasite, ideally Ca3Zr2(Fe3+ 2Si)O12, is a new calcium zirconium silicate-ferrite member of the garnet group from the extinct nephelinitic volcano Kerimasi and surrounding explosion craters in northern Tanzania. The mineral occurs as subhedral crystals up to 100 μm in size in calcite carbonatites, and as euhedral to subhedral crystals up to 180 μm in size in carbonatite eluvium. Kerimasite is light to dark-brown in colour and transparent with a vitreous lustre. No cleavage or parting was observed and the mineral is brittle. The calculated density is 4.105(1) g/cm3. The micro-indentation, VHN 25, ranges from 1168 to 1288 kg/mm2. Kerimasite is isotropic with n = 1.945(5). The average chemical formula of the mineral derived from electron microprobe analyses (sample K 94-25) and calculated for O = 12 and all Fe as Fe2O3 is (Ca3.00Mn 0.01Ce0.01Nd0.01)Σ3.03(Zr 1.72Nb0.14Ti0.08Mg0.02Y 0.02)Σ1.98(Fe3+ 1.23Si 0.86Al0.82Ti0.09)Σ3.00O 12. The largest Fe content determined in kerimasite is 21.6 wt.% Fe2O3 and this value corresponds to 1.66 a.p.f.u. in the tetrahedral site. Kerimasite is cubic, space group Ia3d with a = 12.549(1) {\AA} , V = 1976.2(4) {\AA} 3 and Z = 8. The five strongest powder-diffraction lines [d in {\AA} , (I/Io), hkl] are: 4.441 (49) (220), 3.140 (91) (400), 2.808 (70) (420), 2.564 (93) (422) and 1.677 (100) (642). Single-crystal structure refinement revealed the typical structure of the garnet-group minerals. The name is given after the locality, Kerimasi volcano, Tanzania.",
keywords = "CARBONATITE, CHEMICAL COMPOSITION, CRYSTAL STRUCTURE, GARNET, KERIMASI, KERIMASITE, KIMZEYITE, KISETE, LOLUNI, LOOLMURWAK, NEW MINERAL, TANZANIA",
author = "Zaitsev, {A. N.} and Williams, {C. T.} and Britvin, {S. N.} and Kuznetsova, {I. V.} and J. Spratt and Petrov, {S. V.} and J. Keller",
year = "2010",
month = oct,
day = "1",
doi = "10.1180/minmag.2010.074.5.803",
language = "English",
volume = "74",
pages = "803--820",
journal = "Mineralogical Magazine",
issn = "0026-461X",
publisher = "Mineralogical Society",
number = "5",

}

RIS

TY - JOUR

T1 - Kerimasite, Ca3Zr2(Fe3+2 Si)O 12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania

AU - Zaitsev, A. N.

AU - Williams, C. T.

AU - Britvin, S. N.

AU - Kuznetsova, I. V.

AU - Spratt, J.

AU - Petrov, S. V.

AU - Keller, J.

PY - 2010/10/1

Y1 - 2010/10/1

N2 - Kerimasite, ideally Ca3Zr2(Fe3+ 2Si)O12, is a new calcium zirconium silicate-ferrite member of the garnet group from the extinct nephelinitic volcano Kerimasi and surrounding explosion craters in northern Tanzania. The mineral occurs as subhedral crystals up to 100 μm in size in calcite carbonatites, and as euhedral to subhedral crystals up to 180 μm in size in carbonatite eluvium. Kerimasite is light to dark-brown in colour and transparent with a vitreous lustre. No cleavage or parting was observed and the mineral is brittle. The calculated density is 4.105(1) g/cm3. The micro-indentation, VHN 25, ranges from 1168 to 1288 kg/mm2. Kerimasite is isotropic with n = 1.945(5). The average chemical formula of the mineral derived from electron microprobe analyses (sample K 94-25) and calculated for O = 12 and all Fe as Fe2O3 is (Ca3.00Mn 0.01Ce0.01Nd0.01)Σ3.03(Zr 1.72Nb0.14Ti0.08Mg0.02Y 0.02)Σ1.98(Fe3+ 1.23Si 0.86Al0.82Ti0.09)Σ3.00O 12. The largest Fe content determined in kerimasite is 21.6 wt.% Fe2O3 and this value corresponds to 1.66 a.p.f.u. in the tetrahedral site. Kerimasite is cubic, space group Ia3d with a = 12.549(1) Å , V = 1976.2(4) Å 3 and Z = 8. The five strongest powder-diffraction lines [d in Å , (I/Io), hkl] are: 4.441 (49) (220), 3.140 (91) (400), 2.808 (70) (420), 2.564 (93) (422) and 1.677 (100) (642). Single-crystal structure refinement revealed the typical structure of the garnet-group minerals. The name is given after the locality, Kerimasi volcano, Tanzania.

AB - Kerimasite, ideally Ca3Zr2(Fe3+ 2Si)O12, is a new calcium zirconium silicate-ferrite member of the garnet group from the extinct nephelinitic volcano Kerimasi and surrounding explosion craters in northern Tanzania. The mineral occurs as subhedral crystals up to 100 μm in size in calcite carbonatites, and as euhedral to subhedral crystals up to 180 μm in size in carbonatite eluvium. Kerimasite is light to dark-brown in colour and transparent with a vitreous lustre. No cleavage or parting was observed and the mineral is brittle. The calculated density is 4.105(1) g/cm3. The micro-indentation, VHN 25, ranges from 1168 to 1288 kg/mm2. Kerimasite is isotropic with n = 1.945(5). The average chemical formula of the mineral derived from electron microprobe analyses (sample K 94-25) and calculated for O = 12 and all Fe as Fe2O3 is (Ca3.00Mn 0.01Ce0.01Nd0.01)Σ3.03(Zr 1.72Nb0.14Ti0.08Mg0.02Y 0.02)Σ1.98(Fe3+ 1.23Si 0.86Al0.82Ti0.09)Σ3.00O 12. The largest Fe content determined in kerimasite is 21.6 wt.% Fe2O3 and this value corresponds to 1.66 a.p.f.u. in the tetrahedral site. Kerimasite is cubic, space group Ia3d with a = 12.549(1) Å , V = 1976.2(4) Å 3 and Z = 8. The five strongest powder-diffraction lines [d in Å , (I/Io), hkl] are: 4.441 (49) (220), 3.140 (91) (400), 2.808 (70) (420), 2.564 (93) (422) and 1.677 (100) (642). Single-crystal structure refinement revealed the typical structure of the garnet-group minerals. The name is given after the locality, Kerimasi volcano, Tanzania.

KW - CARBONATITE

KW - CHEMICAL COMPOSITION

KW - CRYSTAL STRUCTURE

KW - GARNET

KW - KERIMASI

KW - KERIMASITE

KW - KIMZEYITE

KW - KISETE

KW - LOLUNI

KW - LOOLMURWAK

KW - NEW MINERAL

KW - TANZANIA

UR - http://www.scopus.com/inward/record.url?scp=78650117380&partnerID=8YFLogxK

U2 - 10.1180/minmag.2010.074.5.803

DO - 10.1180/minmag.2010.074.5.803

M3 - Article

AN - SCOPUS:78650117380

VL - 74

SP - 803

EP - 820

JO - Mineralogical Magazine

JF - Mineralogical Magazine

SN - 0026-461X

IS - 5

ER -

ID: 9274503