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Donpeacorite

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About DonpeacoriteHide

05768440014958714709062.jpg
Donald R. Peacor
Formula:
(Mn2+,Mg)Mg[SiO3]2
Hardness:
5 - 6
Crystal System:
Orthorhombic
Name:
Named in 1984 by Erich U. Petersen, Lawrence M. Anovitz, and Eric J. Essene in honor of Donald Ralph Peacor [b. 1937 Somerville, Massachusetts, USA], mineralogist at the University of Michigan, in recognition of his work on pyroxenes and manganese minerals. He authored/coauthored descriptions of approximately 90 new minerals and worked on the structure of many others.
Dimorph of:
This page provides mineralogical data about Donpeacorite.


Classification of DonpeacoriteHide

Approved
9.DA.05

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
65.1.2.3

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
14.18.7

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe

Physical Properties of DonpeacoriteHide

Hardness:
5 - 6 on Mohs scale

Optical Data of DonpeacoriteHide

Type:
Biaxial (-)
RI values:
nα = 1.677 nβ = 1.684 nγ = 1.692
2V:
Measured: 88° , Calculated: 88°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemical Properties of DonpeacoriteHide

Formula:
(Mn2+,Mg)Mg[SiO3]2
IMA Formula:
(Mn,Mg)MgSi2O6
Common Impurities:
Al,Fe,Ca,Na

Crystallography of DonpeacoriteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 18.38 Å, b = 8.87 Å, c = 5.22 Å
Ratio:
a:b:c = 2.072 : 1 : 0.589
Unit Cell V:
851.02 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000937DonpeacoritePetersen E U, Anovitz L M, Essene E J (1984) Donpeacorite, (Mn,Mg)MgSi2O6, a new orthopyroxene and its proposed phase relations in the system MnSiO3-MgSiO3-FeSiO3 American Mineralogist 69 472-48019840293
0003667DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
0003668DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
0003669DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
0003670DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
0003671DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
0003672DonpeacoriteStimpfl M (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene American Mineralogist 90 155-16120050293
CIF Raw Data - click here to close

Type Occurrence of DonpeacoriteHide

Other Language Names for DonpeacoriteHide

Relationship of Donpeacorite to other SpeciesHide

Other Members of this group:
EnstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbca
FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Donpeacorite associated with TurneaureiteCa5(AsO4)3Cl

Related Minerals - Nickel-Strunz GroupingHide

9.DA.ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DA.05EnstatiteMg2Si2O6Orth. 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.15PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6Mon.
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.25JadeiteNa(Al,Fe3+)Si2O6Mon.
9.DA.25JervisiteNaSc3+Si2O6Mon. 2/m : B2/b
9.DA.25KosmochlorNaCrSi2O6Mon.
9.DA.25NamansiliteNaMn3+Si2O6Mon.
9.DA.25NatalyiteNaV3+Si2O6Mon.
9.DA.30SpodumeneLiAlSi2O6Mon. 2/m : B2/b

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

65.1.2.1EnstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbca
65.1.2.2FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.18.1NambuliteLiMn2+4Si5O14(OH)Tric.
14.18.2Natronambulite(Na,Li)(Mn,Ca)4Si5O14OHTric.
14.18.3ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
14.18.4NorrishiteKLiMn3+2(Si4O10)O2Mon. 2/m : B2/m
14.18.5ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig.
14.18.6AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.8KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
14.18.9CaryopiliteMn2+3Si2O5(OH)4Mon.
14.18.10Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8Orth.
14.18.11Tirodite
14.18.12Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
14.18.13BustamiteCaMn2+(Si2O6)Tric. 1 : P1
14.18.14GlaucochroiteCaMn2+SiO4Orth. mmm (2/m 2/m 2/m)
14.18.15Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
14.18.16SantaclaraiteCaMn4[Si5O14OH](OH) · H2OTric.
14.18.17FerrobustamiteCaFe2+(Si2O6)Tric.
14.18.18JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
14.18.19NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.20OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
14.18.21InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2OTric. 1 : P1
14.18.22OrientiteCa8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O Orth.
14.18.23RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2 · 2H2OMon. 2
14.18.24BostwickiteCaMn3+6Si3O16 · 7H2OOrth.
14.18.25KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
14.18.26LithiomarsturiteLiCa2Mn2Si5O14(OH)Tric.
14.18.27SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
14.18.28KvanefjelditeNa4(Ca,Mn)(Si3O7)2(OH)2Orth.
14.18.29MarsturiteNaCaMn3Si5O14(OH)Tric. 1 : P1
14.18.30RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
14.18.31Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
14.18.32Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2OOrth. mm2 : Ama2
14.18.33Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
14.18.34CalderiteMn2+3Fe3+2(SiO4)3Iso.
14.18.35PyroxmangiteMn2+SiO3Tric. 1
14.18.36Dannemorite◻{Mn2+2}{Fe2+5}(Si8O22)(OH)2
14.18.37Neotocite(Mn,Fe,Mg)SiO3 · H2OAmor.
14.18.38BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)Tric. 1 : P1
14.18.39ManganbabingtoniteCa2(Mn,Fe)FeSi5O14(OH)Tric.
14.18.40ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Hex.

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 DonpeacoriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Petersen, E.U., Anovitz, L.M., Essene, E.J. (1984) Donpeacorite, (Mn,Mg)MgSi2O6 a new orthopyroxene and its proposed phase relations in the system MnSiO3-MgSiO3-FeSiO3. American Mineralogist: 69: 472-480.
Gnos, E., Armbruster, T., Nyfeler, D. (1996) Kanoite, donpeacorite and tirodite: Mn-Mg-silicates from a manganiferous quartzite in the United Arab Emirates. European Journal of Mineralogy: 8: 251-261.
Stimpfl, M. (2005) The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene. American Mineralogist: 90: 155-161.

Internet Links for DonpeacoriteHide

Localities for DonpeacoriteHide

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.
Japan
 
  • Hokkaidō Prefecture
    • Oshima Subprefecture
      • Futami District
        • Yakumo
          • Kumaishi
http://kensou.shinshu-u.ac.jp/Profiles/0005/0001216/pblc1.html
Jordan
 
  • Mafraq Governorate
Yaseen, I. A. A. B. (2014). Petrography and Mineral Chemistry of the Almanden Garnet, and Implication for Kelyphite Texture in the Miocene Alkaline Basaltic Rocks North East Jordan. International Journal of Geosciences, 5(02), 222.
United Arab Emirates
 
  • Emirate of Fujairah
    • Semail Ophiolite
      • Khawr Fakkan Massif (Khor Fakkan)
        • Bani Hamid area
Gnos, E., Armbruster, T., Nyfeler, D. (1996) Kanoite, donpeacorite and tirodite; Mn-Mg-silicates from a manganiferous quartzite in the United Arab Emirates. European Journal of Mineralogy: 8: 251-261.
USA (TL)
 
  • New York
    • St. Lawrence Co.
      • Balmat-Edwards Zinc Mining District
        • Balmat
Fleischer's Glossary of Mineral Species 2004; Rocks & Minerals 82:472-483; Peterson, E.U., Anovitz, L.M., Essene, E.J. (1984) Donpeacorite, (Mn,Mg)MgSi2O6 a new orthopyroxene and its proposed phase relations in the system MnSiO3-MgSiO3-FeSiO3. American Mineralogist: 69: 472-480.
 
Mineral and/or Locality  
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