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Garnet Structural Group

This page kindly sponsored by Mark Kucera
X = Ca, Fe, etc., Z = Al, Cr, etc., T = Si, As, V, etc.
Crystal System:
Named from granatum (a pomegranate) for its resemblance to seeds of this fruit.
A group of cubic and pseudocubic nesosilicates, arsenates, vanadates and members with TO4 groups where T = Al, Fe3+, Te.
Found in many rock types.

Note: on Mindat garnet is used as a group name encompassing the common silicate garnets (almandine, spessartine, grossular, andradite etc.).

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Optical Data of Garnet Structural GroupHide


Chemical Properties of Garnet Structural GroupHide


X = Ca, Fe, etc., Z = Al, Cr, etc., T = Si, As, V, etc.

Crystallography of Garnet Structural GroupHide

Crystal System:

Crystallographic forms of Garnet Structural GroupHide

Crystal Atlas:
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Garnet no.1 - Goldschmidt (1913-1926)
Garnet no.2 - Goldschmidt (1913-1926)
Garnet no.3 - Goldschmidt (1913-1926)
Garnet no.55 - Goldschmidt (1913-1926)
Garnet no.84 - Goldschmidt (1913-1926)
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Synonyms of Garnet Structural GroupHide

Other Language Names for Garnet Structural GroupHide


Relationship of Garnet Structural Group to other SpeciesHide

Group Members:
Almandine Fe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Andradite Ca3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Berzeliite (NaCa2)Mg2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Bitikleite Group 
  Bitikleite Ca3SbSn(AlO4)3Iso. m3m (4/m 3 2/m) : Ia3d
  Dzhuluite Ca3SbSnFe3+3O12Iso. m3m (4/m 3 2/m) : Ia3d
  Elbrusite Ca3(Zr1.5U6+0.5)Fe3+3O12Iso. m3m (4/m 3 2/m) : Ia3d
  Usturite Ca3SbZr(Fe3+O4)3Iso. m3m (4/m 3 2/m) : Ia3d
Blythite Mn2+3Mn3+2[SiO4]3
Calderite (Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
Goldmanite Ca3V3+2(SiO4)3Iso.
Grossular Ca3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Henritermierite Ca3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
Hutcheonite Ca3Ti2(SiAl2)O12Iso. m3m (4/m 3 2/m) : Ia3d
Irinarassite Ca3Sn2Al2SiO12 Iso. m3m (4/m 3 2/m) : Ia3d
Katoite Ca3Al2(SiO4)3-x(OH)4xIso.
Kerimasite Ca3Zr2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
Khoharite Mg3Fe3+2(SiO4)3
Kimzeyite Ca3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.
Knorringite Mg3Cr2(SiO4)3Iso.
Majorite Mg3(Fe2+,Si,Al)2(SiO4)3Iso.
Manganberzeliite NaCa2Mn2+2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Menzerite-(Y) {(Y,REE),(Ca,Fe2+)}3{(Mg,Fe2+),(Fe3+,Al)}2[SiO4]3Iso. m3m (4/m 3 2/m) : Ia3d
Momoiite (Mn2+,Ca)3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Morimotoite Ca3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3Iso.
Palenzonaite (Ca,Na)3CaMn2+2(VO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Pyrope Mg3Al2(SiO4)3Iso.
Schäferite Ca2NaMg2(VO4)3Iso.
Schorlomite Ca3(Ti,Fe3+)2((Si,Fe3+)O4)3Iso.
Skiagite Fe2+3Fe3+2[SiO4]3
Spessartine Mn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Toturite Ca3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
UM1984-37-SiO:CrMn Mn2+3(Cr3+,Mn3+)2Si3O12
Uvarovite Ca3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
Yafsoanite Ca3Zn3(TeO6)2Iso. m3 (2/m 3)
Minerals chemically related to group:

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.

Garnet Structural Group in petrologyHide

References for Garnet Structural GroupHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hutton, Colin Osborne (1962), Composition of some garnets in low-grade schists Royal Society of New Zealand Geology 1: 129-133.
McConnell, D. (1964): Refringence of garnets and hydrogarnets. Canadian Mineralogist 8, 11-22.
Evans, B.W. (1965), Microprobe study of zoning in eclogite garnets: Geol. Soc. Amer. Abstract with Program: 54.
Sobolev, N.V., Jr., Kuznetsova, I.K., and Zyuzin, N.I. (1968) The petrology of grospydite xenoliths from the Zagadochnaya Kimberlite pipe in Yakutia. Journal of Petrology: 9: 253-280.
Dudley, P.P. (1969), Electron microprobe analyses of garnets in glaucophane schists and associated eclogites: American Mineralogist: 54: 1139-1150.
Sawatzky, G.A., Van Der Woude, F., and Morrish, A.H. (1969) Recoilness-fraction ratio for 57Fe in octahedral and tetrahedral sites of a spinel and a garnet. Physical Reviews: 183(2): 383-386.
Reid, A.M., Brown, R.W., DAwson, J.B., Whitfield, G.G., and Siebert, J.C. (1976) Garnet and pyroxene compositions in some diamondiferous eclogites. Contributions to Mineralogy and Petrology: 58: 203-220.
Green, T.H. (1977) Garnet in silicic liquids and its possible use as a P-T indicator. Contributions to Mineralogy and Petrology: 65: 59-67.
Kolesnik, Y.N., Nogteva, V.V., and Paukov, I.Y. (1977) The specific heat of pyrope at 13 to 300 K and the thermodynamic parameters of some natural varieties of garnet. Geochemistry International 1977: 126-133.
Newton, R.C., Charlu, T.V., and Kleppa, O.J. (1977) Thermochemistry of high pressure garnets and clinopyroxenes in the system CaO-MgO-Al2O3-SiO2. Geochimica et Cosmochimica Acta: 41: 369-377.
Schwartz, K.B., Nolet, D.A., and Burns, R.G. (1980) Mössbauer spectroscopy and crystal chemistry of natural Fe-Ti garnets. American Mineralogist: 65: 142-153.
Smith, B.K. (1982), Plastic deformation of garnets; mechanical behavior and associated microstructures, 208 p. University of California, Berkeley, Berkeley, California.
Cecchini A., Franzini M., Troysi M.(1988): Nuovi dati sulla microdurezza dei granati. Atti Soc.Tosc.Sc.Nat., Mem., Serie A, 95, 21-28.
Bell, D.R., Ihinger, P.D., and Rossman, G.R. (1995) Quantitative analysis of trace OH in garnet and pyroxenes. American Mineralogist: 80: 465-474.
Mukhopadhyay, B., Holdaway, M.J., and Koziol, A.M. (1997) A statistical model of the thermodynamic mixing properties of Ca-Mg-Fe2+ garnets. American Mineralogist: 82: 165-181.
Nakano, T. and Ishikawa, Y. (1997) Chemical zoning of pegmatite garnets from the Ishikawa and Yamonoo areas, northeastern Japan. Geochem. Journal: 31: 105-118.
Kolesov, B.A. and Geiger, C.A. (1998) Raman spectra of silicate garnets. Physics and Chemistry of Minerals: 25: 142-151.
Voegele, V., J.I. Ando, P. Cordier, & R.C. Liebermann (1998a), Plastic deformation of silicate garnets; , High-pressure experiments. Physics of the Earth and Planetary Interiors: 108: 305-318.
Voegele, V., P. Cordier, V. Sautter, T.G. Sharp, J.M. Lardeaux, & F.O. Marques (1998b), Plastic deformation of silicate garnets; II, Deformation microstructures in natural samples. Physics of the Earth and Planetary Interiors: 108: 319-338.
Bofa Ballaran, T., Carpenter, M.A., Geiger, C.A., and Kozol, A. (1999) Local structural heterogeneity in garnet solid solutions. Physics and Chemistry of Minerals: 26: 554-569.
Wang, L., E.J. Essene, & . Zhang (1999a), Mineral inclusions in pyrope crystals from Garnet Ridge, Arizona, USA; implications for processes in the upper mantle: Contributions to Mineralogy and Petrology: 135: 164-178.
Wang, Z., S. Ji, T.E. Rivers, D.R.M.E. Pattison, & R.F.E. Martin (1999): Deformations of silicate garnets; brittle-ductile transition and its geological implications, Mineral-scale processes in metamorphic petrology; the Kretz volume. Canadian Mineralogist: 37(2): 525-541.
Arredondo, E.H. and Rossman, G.R. (2002) Feasibility of determining the quantitative OH content of garnets with Raman spectroscopy. American Mineralogist: 87: 307-311.
Wang, L., Essene, E.J., and Zhang, Y. (2000) Direct observation of immiscibility in pyrope-almandine-grossular garnet. American Mineralogist: 85: 41-46.
Geiger, C. A. (2013): Garnet: A key phase in nature, the laboratory, and technology. Elements 9, 447-452.
Galoisy, L. (2013): Garnet: From stone to star. Elements 9, 453-456.
Grew, E. S., Locock, A. J., Mills, S. J., Galuskina, I. O., Galuskin, E. V., & Hålenius, U. (2013): Nomenclature of the garnet supergroup. American Mineralogist, 98, 785-811.

Internet Links for Garnet Structural GroupHide

Localities for Garnet Structural GroupHide

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