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Donpeacorite

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About DonpeacoriteHide

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.
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)

Type Occurrence of DonpeacoriteHide

Other Language Names for DonpeacoriteHide

Relationship of Donpeacorite to other SpeciesHide

Other Members of this group:
EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
ensteniteA series name for the orthopyroxenes of the MgSiO3 -FeSiO3 isomorphous series (enstatite - ...
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:
Turneaureite2 photos of Donpeacorite associated with Turneaureite on mindat.org.

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.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.
9.DA.25KosmochlorNaCrSi2O6Mon.
9.DA.25NamansiliteNaMn3+Si2O6Mon.
9.DA.25NatalyiteNaV3+Si2O6Mon.
9.DA.30SpodumeneLiAlSi2O6Mon.

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

65.1.2.1EnstatiteMgSiO3Orth. 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
14.18.5Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2OTrig.
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)8
14.18.11Tirodite
14.18.12Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
14.18.13BustamiteCaMn2+(Si2O6)Tric. 1 : P1
14.18.14GlaucochroiteCaMn2+SiO4Orth.
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
14.18.24BostwickiteCaMn6Si3O16 · 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) · H2O
14.18.33Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
14.18.34Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
14.18.35PyroxmangiteMnSiO3Tric. 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)
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.

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
 
  • Hokkaido
    • Oshima peninsula
      • Kumaishi
http://kensou.shinshu-u.ac.jp/Profiles/0005/0001216/pblc1.html
United Arab Emirates
Eur. J. Mineral., 8, 251-261
  • Fujayrah Emirate (Fujairah)
    • Semail Ophiolite
      • Khawr Fakkan Massif (Khor Fakkan)
        • Bani Hamid area
E. Gnos et al., Eur. J. Mineral. , 1996, 8, pp. 251-261.
USA (TL)
 
  • New York
    • St. Lawrence Co.
      • Balmat-Edwards Zinc 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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