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Alkali pyroxene

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About Alkali pyroxeneHide

A petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite.


Unique IdentifiersHide

Mindat ID:
48005
Long-form identifier:
mindat:1:1:48005:3

Age distributionHide

Recorded ages:
Phanerozoic : 235.9 ± 5 Ma to 42 ± 1 Ma - based on 8 recorded ages.

Chemical AnalysisHide

Oxide wt%:
 123
SiO251,10 %52.14 %52.59 %
TiO20.28 %0.47 %0.23 %
ZrO21.30 %0.06 %
SnO20.12 %
Al2O31.02 %0.29 %0.13 %
Fe2O315.77 %
FeO9.62 %
MnO1.13 %1.36 %0.95 %
MgO0.96 %4.92 %7.10 %
CaO9.72 %12.14 %14.08 %
Na2O7.66 %6.99 %5.69 %
V2O30.66 %2.00 %
Fe2O3*16.39 %12.13 %
FeO*4.60 %5.02 %
ZnO0.06 %0.03 %
SrO0.05 %0.05 %
NiO0.02 %
Total:98.58 %100.13 %100.02 %
Empirical formulas:
Sample IDEmpirical Formula
2(Na0.52Ca0.48)(Fe3+0.47Mg0.28Fe2+0.15Mn2+0.04V0.02Ca0.02Ti0.01)[Si1.99Al0.01O6]
3(Ca0.57Na0.42Mn2+0.01)(Mg0.40Fe3+0.35Fe2+0.16V0.06Mn2+0.02Ti0.01)[Si2.00O6]
Sample references:
IDLocalityReferenceNotes
1Skutesundskjær, Barkevik area, Larvik Commune, Vestfold, NorwayContains 68ppm Li
2North Wilson pit, Union Carbide Mine, Wilson Springs, Garland County, Arkansas, USAaverage of 2 analyses of patchy "higher z" zones in abundant aegirine-augite, in wollastonite. Normalized to ∑(cations) = 4. *Fe3+/∑Fe calculated by charge balance.
3  "  "average of 2 analyses of the main "lower z" portions of abundant aegirine-augite, in wollastonite. Normalized to ∑(cations) = 4. *Fe3+/∑Fe calculated by charge balance.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000336AegirineCameron M, Sueno S, Prewitt C T, Papike J J (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite pyroxene American Mineralogist 58 594-61819730297
0000337AegirineCameron M, Sueno S, Prewitt C T, Papike J J (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite pyroxene American Mineralogist 58 594-61819730673
0000338AegirineCameron M, Sueno S, Prewitt C T, Papike J J (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite pyroxene American Mineralogist 58 594-61819730873
0000339AegirineCameron M, Sueno S, Prewitt C T, Papike J J (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite pyroxene American Mineralogist 58 594-618197301073
0004204AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0293
0004208AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004209AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004210AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004211AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0293
0004212AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0293
0004213AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004214AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004215AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004216AegirineRedhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W (2006) Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution American Mineralogist 91 1271-12922006synthetic0298
0004447AegirineNestola F, Tribaudino M, Ballaran T B, Liebske C, Bruno M (2007) The crystal structures of pyroxenes along the jadeite - hedenbergite and jadeite - aegirine joins American Mineralogist 92 1492-15012007synthetic0293
0004448AegirineNestola F, Tribaudino M, Ballaran T B, Liebske C, Bruno M (2007) The crystal structures of pyroxenes along the jadeite - hedenbergite and jadeite - aegirine joins American Mineralogist 92 1492-15012007synthetic0293
0006820AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0006821AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0006822AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0006823AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0006824AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0006825AegirineRedhammer G J, Amthauer G, Lottermoser W, Treutmann W (2000) Synthesis and structural properties of clinopyroxenes of the hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series European Journal of Mineralogy 12 105-12020000293
0007425AegirineGhose S, Kersten M, Langer K, Rossi G, Ungaretti L (1986) Crystal field spectra and Jahn Teller effect of Mn3+ in clinopyroxene and clinoamphiboles from India Physics and Chemistry of Minerals 13 291-30519860293
0007464AegirineBallet O, Coey J M D, Fillion G, Ghose A, Hewat A W, Regnard J R (1989) Magnetic order in acmite; NaFeSi2O6 Physics and Chemistry of Minerals 16 672-67719890293
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Synonyms of Alkali pyroxeneHide

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.

Alkali pyroxene in petrologyHide

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

Internet Links for Alkali pyroxeneHide

References for Alkali pyroxeneHide

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Localities for Alkali pyroxeneHide

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