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Garnet Structural Group

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

Classification of Garnet Structural Group

Optical Data of Garnet Structural Group


Chemical Properties of Garnet Structural Group


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

Crystallography of Garnet Structural Group

Crystal System:

Crystallographic forms of Garnet Structural Group

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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Relationship of Garnet Structural Group to other Species

Group Members:
Almandine Fe32+Al2(SiO4)3
Andradite Ca3Fe23+(SiO4)3
Berzeliite (NaCa2)Mg2(AsO4)3
Bitikleite Group 
  Bitikleite Ca3SbSn(AlO4)3
  Dzhuluite Ca3SbSnFe33+O12
  Elbrusite Ca3U6+ZrFe23+Fe2+O12
  Usturite Ca3SbZr(Fe3+O4)3
Blythite Mn32+Mn23+[SiO4]3
Calderite (Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Goldmanite Ca3V23+(SiO4)3
Grossular Ca3Al2(SiO4)3
Henritermierite Ca3(Mn3+,Al)2(SiO4)2(OH)4
Hutcheonite Ca3Ti2(SiAl2)O12
Irinarassite Ca3Sn2Al2SiO12
Katoite Ca3Al2(SiO4)3-x(OH)4x
Kerimasite Ca3Zr2(SiO4)(Fe3+O4)2
Khoharite Mg3Fe23+(SiO4)3
Kimzeyite Ca3(Zr,Ti)2((Si,Al,Fe3+)O4)3
Knorringite Mg3Cr2(SiO4)3
Majorite Mg3(Fe2+,Si,Al)2(SiO4)3
Menzerite-(Y) {(Y,REE),(Ca,Fe2+)}3{(Mg,Fe2+),(Fe3+,Al)}2[SiO4]3
Momoiite (Mn2+,Ca)3V23+(SiO4)3
Morimotoite Ca3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
Palenzonaite (Ca,Na)3CaMn22+(VO4)3
Pyrope Mg3Al2(SiO4)3
Schäferite Ca2NaMg2(VO4)3
Schorlomite Ca3(Ti,Fe3+)2((Si,Fe3+)O4)3
Skiagite Fe32+Fe23+[SiO4]3
Spessartine Mn32+Al2(SiO4)3
Toturite Ca3Sn2(SiO4)(Fe3+O4)2
UM1984-37-SiO:CrMn Mn32+(Cr3+,Mn3+)2Si3O12
Uvarovite Ca3Cr2(SiO4)3
Yafsoanite Ca3Zn3(TeO6)2
Minerals chemically related to group:

Other Names for Garnet Structural Group

Name in Other Languages:

Other Information

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 petrology

An essential component of (items highlighted in red)
Common component of (items highlighted in red)

References for Garnet Structural Group

Reference List:
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 (1999b), Defromations of silicate garnets; brittle-ductile transition and its geological implications, Mineral-scale processes in metamorphic petrology; the Kretz volume.The 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(4), 785-811.

Internet Links for Garnet Structural Group URL:
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Localities for Garnet Structural Group

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