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About KosmochlorHide

emerald green
Crystal System:
Named for the Greek words for space and the color green. Found as a residue after dissolution of the Toluca iron meterorite.
Pyroxene Group - Clinopyroxene Subgroup.
Jadeite-Kosmochlor Series.

A rare, bright green pyroxene, found in some jade deposits and meteorites.
Also a colouring component of the decorative rock Maw Sit Sit.

Classification of KosmochlorHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2

14 : Silicates not Containing Aluminum
15 : Silicates of Cr

Physical Properties of KosmochlorHide

emerald green
pale green

Optical Data of KosmochlorHide

RI values:
nα = 1.766 nγ = 1.781
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of KosmochlorHide

IMA Formula:
Common Impurities:

Crystallography of KosmochlorHide

Crystal System:
Cell Parameters:
a = 9.57 Å, b = 8.71 Å, c = 5.26 Å
β = 107.49°
a:b:c = 1.099 : 1 : 0.604
Unit Cell V:
418.18 ų (Calculated from Unit Cell)

Type Occurrence of KosmochlorHide

Synonyms of KosmochlorHide

Other Language Names for KosmochlorHide

Relationship of Kosmochlor to other SpeciesHide

Other Members of this group:
AegirineNaFe3+Si2O6Mon. 2/m : B2/b
Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
BurnettiteCaVAlSiO6Mon. 2/m : B2/b
ClinoenstatiteMgSiO3Mon. 2/m : P21/b
ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
DavisiteCaScAlSiO6Mon. 2/m : B2/b
DiopsideCaMgSi2O6Mon. 2/m : B2/b
EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
JervisiteNaSc3+Si2O6Mon. 2/m : B2/b
JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
Tissintite(Ca,Na,□)AlSi2O6Mon. 2/m : B2/b
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Kosmochlor associated with AlbiteNa(AlSi3O8)
4 photos of Kosmochlor associated with ChromojadeiteNa(Al,Cr)Si2O6
2 photos of Kosmochlor associated with JadeiteNa(Al,Fe3+)Si2O6
2 photos of Kosmochlor associated with Chromian Magnesio-arfvedsonite[Na][Na2][Mg4(Fe3+,Cr3+)]Si8O22(OH)2
1 photo of Kosmochlor associated with TinSn
1 photo of Kosmochlor associated with Maw Sit Sit

Related Minerals - Nickel-Strunz GroupingHide

9.DA.ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DA.05EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.05FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.10ClinoenstatiteMgSiO3Mon. 2/m : P21/b
9.DA.10ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
9.DA.10Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
9.DA.15Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
9.DA.15DiopsideCaMgSi2O6Mon. 2/m : B2/b
9.DA.15EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
9.DA.15HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
9.DA.15JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
9.DA.15DavisiteCaScAlSiO6Mon. 2/m : B2/b
9.DA.15KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
9.DA.15GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
9.DA.20Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
9.DA.20Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
9.DA.25AegirineNaFe3+Si2O6Mon. 2/m : B2/b
9.DA.25JervisiteNaSc3+Si2O6Mon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)Hide

65.1.3c.2AegirineNaFe3+Si2O6Mon. 2/m : B2/b
65.1.3c.6JervisiteNaSc3+Si2O6Mon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.15.5UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d

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.

Kosmochlor in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

References for KosmochlorHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Laspeyres, H. (1897) Die steinigen Gemengtheile im Meteoreisen von Toluca in Mexico. Zeitschrift für Krystallographie und Mineralogie: 27: 586–600.
Frondel, C., Klein Jr., C. (1965) Ureyite, NaCr2Si2O6, a new meteoritic pyroxene. Science: 149: 742-744.
Gübelin, E. (1965): Maw-sit-sit proves to be jade-albite. J. Gemmology 9 (11), 372-379. [as "chrome-jadeite"]
Fleischer, M. (1965) New mineral names. American Mineralogist: 50: 2096. [as ureyite]
Neuhaus, A. (1967) Über Kosmochlor (Ureyit). Naturwissenschaften: 54: 440-441.
Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 511.
Clark, J.R., Appleman, D.E., Papike, J.J. (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper: 2: 31-50.
Cameron, M., Shigeho, S., Prewitt, C.T., Papike, J.J. (1973) High temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene and ureyite. American Mineralogist: 58: 594-618.
Morimoto, N., Fabries, J., Ferguson, A.K., Ginzburg, I.V., Ross, M., Seibert, F.A., Zussman, J., Aoki, K., Gottardi, G. (1988) Nomenclature of Pyroxenes. Mineralogical Magazine: 52: 535-550.
Origlieri, M.J., Downs, R.T., Thompson, R.M., Pommier, C.J.S., Denton, M.B., harlow, G.E. (2003) High-pressure crystal structure of kosmochlor, NaCrSi2O6 and systematics of anisotropic compression in pyroxenes. American Mineralogist: 88: 1025-1032.
Shi, G. H., Stöckhert, B., Cui, W.Y. (2005): Kosmochlor and chromian jadeite aggregates from the Myanmar jadeitite area. Mineral. Mag. 69, 1059-1075.

Internet Links for KosmochlorHide

Localities for KosmochlorHide

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.
  • Ağcabədi District (Aghjabadi)
    • Shusha
Lee M R, Russell S S, Arden J W, Pillinger C T (1995) Nierite (Si3N4), a new mineral from ordinary and enstatite chondrites, Meteoritics, 30, 387-398
  • Occitanie
    • Tarn-et-Garonne
      • Orgueil
A. Greshake & Adolf Bischoff (1996). Chromium-bearing Phases in Orgueil (CI): Discovery of Magnesiochromite (MgCr2O4), Ureyite (NaCrSi2O6), and Chromium Oxide (Cr2O3). Lunar and Planetary Science, 27, p. 461.
  • Piedmont
    • Metropolitan City of Turin
      • Susa Valley
        • Condove
Fornaseri M., Bensa G. (1939): Sulla cloromelanitite di Mocchie in Val di Susa. Periodico di Mineralogia - Roma pp. 217-230.
  • Niigata
      • Ōmi
Fossa Magna Museum specimen, Itoigawa
  • Okayama
    • Niimi City
Sakamoto & Takasu (1996) Chishitsugaku Zasshi, 102, 49-52.
  • Coahuila
    • Bolsom de Mapimí
Phil. Trans. R. Soc. Lond A. 286, 453-491 (1977)
  • Mexico
    • Jiquipilco (Xiquipilco)
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Laspeyres, H. 1897 Die steinigen Gemengtheile im Meteoreisen von Toluca in Mexico. Z. Kristallogr. Kristallgeom. 27, 586-600.
  • Kachin State
    • Mohnyin District (Moe Hnyin District)
      • Hpakant Township (Hpakan; Phakant; Phakan)
Shi, G. H., Zhu, X. K., Deng, J., Mao, Q., Liu, Y. X., & Li, G. W. (2011). Geochimica et Cosmochimica Acta, 75(6), 1608-1620; Shi, G., Harlow, G.E., Wang, J. Wang, J., Ng, E., Wang, X., Cao, G. & Cui, W. (2012): Mineralogy of jadeitite and related rocks from Myanmar:a review with new data. Eur. J. Mineral. 24, 345–370
American Mineralogist, Volume 69, pages 1180-1i,83' 1984; Nyunt, T. T. (2009). Petrological and geochemical contribution to the origin of jadeitite and associated rocks of the Tawmaw Area, Kachin State, Myanmar.
  • Greater Poland Voivodeship
    • Poznań Co.
  • Irkutsk Oblast
    • Lake Baikal area
      • Slyudyanka (Sludyanka)
Bosi, F., Reznitskii, L., Skogby, H., & Hålenius, U. (2014). Vanadio-oxy-chromium-dravite, NaV3 (Cr4Mg2)(Si6O18)(BO3) 3 (OH) 3O, a new mineral species of the tourmaline supergroup. American Mineralogist, 99(5-6), 1155-1162.
  • Murmansk Oblast
    • White Sea Coast
Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 132, issue 3, 101-108
South Africa
  • Western Cape
    • Cape Winelands District
Phil. Trans. R. Soc. Lond A. 286, 453-491 (1977)
  • Arizona
    • Coconino County
      • Meteor Crater area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 171-172, 269, 354; Olsen, E. & L. Fuchs (1968), Krinovite, NaMg2CrSi3O10 = a new meteorite mineral, Science 161: 786-787.; Space Science Reviews, Volume 14, Issue 6, pp.758-831
  • Kansas
    • McPherson Co.
Lee M R, Russell S S, Arden J W, Pillinger C T (1995) Nierite (Si3N4), a new mineral from ordinary and enstatite chondrites, Meteoritics, 30, 387-398
  • Utah
    • San Juan Co.
Schulze, D. J., Flemming, R. L., Shepherd, P. H., & Helmstaedt, H. (2014). Mantle-derived guyanaite in a Cr-omphacitite xenolith from Moses Rock diatreme, Utah. American Mineralogist, 99(7), 1277-1283.
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