Pyroxferroite
A valid IMA mineral species
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About Pyroxferroite
Formula:
(Fe,Mn,Ca)SiO3
Colour:
Pale yellow, orange-yellow, yellow, light brown
Hardness:
4½ - 5½
Specific Gravity:
3.68 - 3.76
Crystal System:
Triclinic
Name:
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.
Type Locality:
Polymorph of:
Isostructural with:
Unique Identifiers
Mindat ID:
3326
Long-form identifier:
mindat:1:1:3326:4
GUID
(UUID V4):
(UUID V4):
2e7f11ff-4e8f-4daa-ba30-81f2e938d2d7
IMA Classification of Pyroxferroite
Approved
IMA Formula:
Fe2+SiO3
Type description reference:
Chao, E.C.T., Minkin, J.A., Frondel, C., Klein, C., Drake, J.C., Fuchs, L., Tani, B., Smith, J.V., Anderson, A.T., Moore, P.B., Zechman, G.R., Traill, R.J., Plant, A.G., Douglas, J.A.V., Dence, M.R. (1970) Pyroxferroite, a new calcium-bearing iron silicate from Tranquillity Base. Geochimica et Cosmochimica Acta, 34. Elsevier BV. 65-79 doi:10.1016/0016-7037(70)90170-5
Classification of Pyroxferroite
9.DO.05
9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
65.6.1.2
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
6 : Single-Width Unbranched Chains, W=1 with chains P=7
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
6 : Single-Width Unbranched Chains, W=1 with chains P=7
14.22.2
14 : Silicates not Containing Aluminum
22 : Silicates of Fe and Ca
14 : Silicates not Containing Aluminum
22 : Silicates of Fe and Ca
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Pxf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pxf | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
Physical Properties of Pyroxferroite
Transparency:
Translucent
Colour:
Pale yellow, orange-yellow, yellow, light brown
Hardness:
4½ - 5½ on Mohs scale
Cleavage:
Distinct/Good
Good on {010}, poor on {001}
Good on {010}, poor on {001}
Density:
3.68 - 3.76 g/cm3 (Measured) 3.82 g/cm3 (Calculated)
Optical Data of Pyroxferroite
Type:
Biaxial (+)
RI values:
nα = 1.748 - 1.756 nβ = 1.750 - 1.758 nγ = 1.767 - 1.768
2V:
Measured: 34° to 40°, Calculated: 50° to 58°
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v marked
Pleochroism:
Weak
Comments:
pale yellow to yellow-orange.
Chemistry of Pyroxferroite
Mindat Formula:
(Fe,Mn,Ca)SiO3
Common Impurities:
Ti,Al,Mg,Na
Crystallography of Pyroxferroite
Crystal System:
Triclinic
Cell Parameters:
a = 6.6213 Å, b = 7.5506 Å, c = 17.3806 Å
α = 144.267°, β = 82.684°, γ = 94.756°
α = 144.267°, β = 82.684°, γ = 94.756°
Ratio:
a:b:c = 0.877 : 1 : 2.302
Unit Cell V:
503.02 ų (Calculated from Unit Cell)
Z:
14
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0015363 | Pyroxferroite | Burnham C W (1971) The crystal structure of pyroxferroite from Mare Tranquillitatis Proceedings of the Second Lunar Science Conference 1 47-57 | 1971 | Apollo 11 microgabbro sample 10047, Mare Tranquillitatis, Moon | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.934 Å | (100) |
2.674 Å | (60) |
3.09 Å | (45) |
4.68 Å | (40) |
2.156 Å | (40) |
2.579 Å | (35) |
1.410 Å | (35) |
Type Occurrence of Pyroxferroite
General Appearance of Type Material:
discrete grains
Place of Conservation of Type Material:
Lunar Science Institute, Houston, Texas, USA
Associated Minerals at Type Locality:
Reference:
Chao E.C.T., Minkin J.A., Frondel C., Klein C., Drake J.C., Fuchs L., Tani B., Smith J.V., Anderson A.T., Moore P.B., Zechman G.R., Traill R.J., Plant A.G., Douglas J.A.V., Dence M.R. (1970) Pyroxferroite, a new calcium-bearing iron silicate from Tranquillity Base, - Geochimica et Cosmochimica Acta, Supplemental Proceedings of the Apollo XI Lunar Science Conference,v.34(1), pp. 65-79.
Synonyms of Pyroxferroite
Other Language Names for Pyroxferroite
Relationship of Pyroxferroite to other Species
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
9.DO. | Braccoite | NaMn2+5[Si5As5+O17(OH)](OH) |
9.DO. | Illoqite-(Ce) | Na2NaBaCeZnSi6O17 |
9.DO.05 | Pyroxmangite | Mn2+SiO3 |
9.DO.10 | Pellyite | Ba2Ca(Fe,Mg)2Si6O17 |
9.DO.15 | Nordite-(Ce) | (Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 |
9.DO.15 | Nordite-(La) | (La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 |
9.DO.15 | Ferronordite-(Ce) | Na3SrCeFe2+Si6O17 |
9.DO.15 | Manganonordite-(Ce) | Na3SrCeMn2+Si6O17 |
9.DO.15 | Ferronordite-(La) | Na3Sr(La,Ce)FeSi6O17 |
9.DO.15 | Meieranite | Na2Sr3MgSi6O17 |
9.DO.20 | Alamosite | PbSiO3 |
9.DO.25 | Liebauite | Ca3Cu5Si9O26 |
9.DO.30 | Vladykinite | Na3Sr4(Fe2+Fe3+)Si8O24 |
9.DO.30 | Rundqvistite-(Ce) | Na3(Sr3Ce)[Zn2Si8O24] |
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.
Internet Links for Pyroxferroite
mindat.org URL:
https://www.mindat.org/min-3326.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Pyroxferroite
Reference List:
Chao, E.C.T., Minkin, J.A., Frondel, C., Klein, C., Drake, J.C., Fuchs, L., Tani, B., Smith, J.V., Anderson, A.T., Moore, P.B., Zechman, G.R., Traill, R.J., Plant, A.G., Douglas, J.A.V., Dence, M.R. (1970) Pyroxferroite, a new calcium-bearing iron silicate from Tranquillity Base. Geochimica et Cosmochimica Acta, 34. Elsevier BV. 65-79 doi:10.1016/0016-7037(70)90170-5
Chao, E.C.T., Minkin, J.A., Frondel, C., Klein, C., Drake, J.C., Fuchs, L., Tani, B., Smith, J.V., Anderson, A.T., Moore, P.B., Zechman, G.R., Traill, R.J., Plant, A.G., Douglas, J.A.V., Dence, M.R. (1970) Pyroxferroite, a new calcium-bearing iron silicate from Tranquillity Base. Geochimica et Cosmochimica Acta, 34. Elsevier BV. 65-79 doi:10.1016/0016-7037(70)90170-5
Localities for Pyroxferroite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Antarctica | |
| McSween Jr. et al. (1998) |
| McSween Jr. et al. (1998) +1 other reference |
Australia | |
| Singer et al. (2009) |
Finland | |
| Ahven (2012) |
| Bulletin de la Commission Geologique de ... +1 other reference |
| Heikkilä +1 other reference |
Germany | |
| Blass et al. (1998) |
Japan | |
| Petrov (n.d.) |
Masutomi Museum specimens (Kyoto) | |
Yamada et al. (1980) | |
Oman | |
| Taylor et al. (2001) |
Yukio et al. (2006) | |
Romania | |
| Hîrtopanu (2006) +3 other references |
Spain | |
| Dill et al. (2023) |
Sweden | |
| Holtstam (2001) |
USA | |
| Nikischer et al. (2007) |
| Nikischer et al. (2007) |
The Moon (TL) | |
Chao et al. (1970) | |
Vol.2: Chemical Isotope Analyses +2 other references | |
| Longhi et al. (1974) |
Quick NavTopAbout PyroxferroiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany