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Pale yellow, orange-yellow, yellow, light brown
4½ - 5½
Crystal System:
Named in 1970 by Edward Ching-Te Chao, Jean A. Minkin, Clifford Frondel, Cornelius Klein, Jr., John C. Drake, Louis H. Fuchs, B. Tani, Joseph V. Smith, A. T. Anderson, Paul B. Moore, G. R. Zechman, Jr., Robert James Traill, A. G. Plant, J. A. V. Douglas, and Michael R. Dence for the mineral's iron-rich relationship to pyroxmangite.
Isostructural with:
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Classification of PyroxferroiteHide


9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
6 : Single-Width Unbranched Chains, W=1 with chains P=7

14 : Silicates not Containing Aluminum
22 : Silicates of Fe and Ca

Physical Properties of PyroxferroiteHide

Pale yellow, orange-yellow, yellow, light brown
4½ - 5½ on Mohs scale

Optical Data of PyroxferroiteHide

Biaxial (+)
RI values:
nα = 1.746 - 1.756 nβ = 1.750 - 1.758 nγ = 1.764 - 1.768
Measured: 30° to 40°, Calculated: 50° to 58°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v marked

Chemical Properties of PyroxferroiteHide

IMA Formula:
Common Impurities:

Crystallography of PyroxferroiteHide

Crystal System:
Cell Parameters:
a = 6.62 Å, b = 7.55 Å, c = 17.38 Å
α = 144.26°, β = 82.68°, γ = 94.75°
a:b:c = 0.877 : 1 : 2.302
Unit Cell V:
502.94 ų (Calculated from Unit Cell)

Type Occurrence of PyroxferroiteHide

Synonyms of PyroxferroiteHide

Other Language Names for PyroxferroiteHide

Simplified Chinese:三斜铁辉石

Relationship of Pyroxferroite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Gahnite3 photos of Pyroxferroite associated with Gahnite on
Calcite3 photos of Pyroxferroite associated with Calcite on

Related Minerals - Nickel-Strunz GroupingHide

9.DO.05PyroxmangiteMnSiO3Tric. 1

Related Minerals - Dana Grouping (8th Ed.)Hide 1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.22.1HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
14.22.3 Ferro-akermaniteCa2FeSi2O7
14.22.4KirschsteiniteCaFe2+SiO4Orth. mmm (2/m 2/m 2/m) : Pnma
14.22.7IlvaiteCaFe3+Fe2+2(Si2O7)O(OH)Orth. mmm (2/m 2/m 2/m)
14.22.8Julgoldite-(Fe2+)Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
14.22.9AndraditeCa3Fe3+2(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.

References for PyroxferroiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Edward Ching-Te Chao, J. A. Minkin, Clifford Frondel, Cornelius Klein, Jr., J. C. Drake, L. Fuchs, B. Tani, Joseph V. Smith, A. T. Anderson, Paul B. Moore, G. R. Zechman, Jr., R. J, Traill, A. G. Plant, J. A. V. Douglas, and M. R. Dence (1970) American Mineralogist: 55: 2137.
Geochemica et Cosmochimica Acta: 34(1): 65-79.
Burnham, C. (1971) The crystal structure of pyroxferroite from Mare Tranquilitatis. Supplement to Geochemica et Cosmochimica Acta: 34(2): 47-57.
Nikischer, Tony and Joe Orosz (2007) Lunar Mineral Found at Franklin, Sussex Co., New Jersey. Mineral News: 23(8): 1, 2, 9, 14.

Internet Links for PyroxferroiteHide

Localities for PyroxferroiteHide

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.
  • Eastern Antarctica
    • Victoria Land
      • Elephant Moraine
McSween Jr., HY & Treiman, AH (1998) Martian Meteorites. In: Planetary Materials (Papike, JJ - Ed.), Chapter 6: 1-53: Mineralogical Society of America, Washington, DC, USA.
      • Queen Alexandra Range
McSween Jr., H.Y. & Treiman, A.H. (1998) Martian Meteorites. In: Planetary Materials (Papike, JJ - Ed.), Chapter 6: 1-53: Mineralogical Society of America, Washington, DC, USA.; Aramovich, C. J., Herd, C. D. K. & Papike, J. J. (2001) Possible Causes for Late-Stage Reaction Textures Associated with Pyroxferroite and Metastable Pyroxenes in the Basaltic Martian Meteorites (abstract): 32nd Annual Lunar and Planetary Science Conference, abstract#1003. (Mar 2001)
  • Queensland
    • McKinlay Shire
      • McKinlay
USGS Open-File Report 2009-1252 Sediment-hosted zinc-lead deposits of the world - Database and grade and tonnage models
  • Eastern Finland Region
    • Kuopio
      • Rautalampi
Ahven, Marja (2012) Rautalammin Kiviniemen granaattipitoinen ferrogabbro. Pro gradu tutkielma. Geotieteiden ja maantieteen laitos, Geologian osasto, Helsingin yliopisto.
  • Western and Inner Finland Region
    • Lapua
Bulletin de la Commission Geologique de Finlande 115; 387-400, 1936
    • Seinäjoki
Mancini, F., Alviola, R., Marshall, B., Satoh, H., & Papunen, H. (2000). The manganese silicate rocks of the early Proterozoic Vittinki group, southwestern Finland: Metamorphic grade and genetic interpretations. The Canadian Mineralogist, 38(5), 1103-1124.
Heikkilä, Pasi 2003. Vittinki-ryhmän metaserttien geologia ja mineralogia Etelä-Pohjanmaalla. Pro gradu, matemaattis-luonnontieteellinen tiedekunta, Geologian laitos. Helsingin Yliopisto.
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Blass, G., Graf, H.W., Neufunde von bekannten Fundorten (20), Mineralien-Welt 9/1, 45, 1998] [A. Wittern: Mineralfundorte in Deutschland, Schweizerbart (Stuttgart), 2001]
  • Honshu Island
    • Kinki Region
      • Kyoto Prefecture
        • Kyotango City
Masutomi Museum specimens (Kyoto)
Yamada et al (1980), Chigaku Kenkyu: 31: 205-222.
        • Naka-gun
          • Mineyama-cho
Alfredo Petrov - private communication (2008)
  • Dhofar Governorate (Al Janubiyah Province)
Taylor, L. A., Nazarov, M. A., Demidova, S. I., & Patchen, A. D. (2001). Dhofar 287: A new lunar mare basalt from Oman. Meteoritics and Planetary Science Supplement, 36, 204.
Yukio, I., Makoto, K., Hiroshi, T., Gen, S., Kita, N., Yuichi, M., ... & Gerlind, D. (2006). Petrology of a new basaltic shergottite: Dhofar 378. Antarctic Meteorite Research, 19, 20-44.
  • Maramureș Co.; Hîrtopanu, P. (2006) One Hundred Minerals For One Hundred Years (dedicated To The Centennial Of The Geological Institute Of Romania) Acta Mineralogica-Petrographica, Abstract Series 5, Szeged, p38
  • Dalarna
    • Smedjebacken
Holtstam, D. (2001): Pyroxferroit, ett månmineral från Väster Silvberg, Dalarna. Litiofilen. 18(2), 23-25
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Nikischer, Tony and Joe Orosz (2007) Lunar Mineral Found at Franklin, Sussex Co., New Jersey. Mineral News: 23(8): 1, 2, 9, 14.
  • South Carolina
    • Anderson Co.
Nikischer, Tony and Joe Orosz (2007) Lunar Mineral Found at Franklin, Sussex Co., New Jersey. Mineral News: 23(8): 1, 2, 9, 14.
The Moon (TL)
Geochemica et Cosmochimica Acta: 34(1): 65-79
  • Taurus-Littrow Valley
Longhi, J., Walker, D., Grove, T. L., Stolper, E. M., & Hays, J. F. (1974) The petrology of the Apollo 17 mare basalts. In: Lunar Science Conference, 5th, Houston, Tex., March 18-22, 1974, Proceedings. Volume 1. (A75-39540 19-91) New York, Pergamon Press, Inc., 1974, p. 447-469.
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