Dorrite (original) (raw)

A valid IMA mineral species

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About DorriteHide

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Formula:

Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)

Idealized formula for Kopeisk material: Ca4Mg4Fe3+8[Al8Si4O20]

Colour:

red-brown, brown-black, dark brown

Specific Gravity:

3.059 (Calculated)

Name:

Named by Michael A. Cosca, Roland R. Rouse, and Eric J. Essene in 1987 in honor of John A. "Jack" Dorr, Jr. (1922/3 - 8 April 1986), Professor of Geology, University of Michigan, Ann Arbor, Michigan, USA, in recognition of his geologic research in Wyoming.

Stable in strongly oxidizing, high-temperature low-pressure environments.

Site occupancy for dorrite from Kopeisk (Shchipalkina et al., 2016), is: _M_1: (Fe3+,Mg); _M_2: (Fe3+,Mg); _M_3: 2(Fe3+,Mg); _M_4: 2(Fe3+,Mg); _M_5: 2Mg; _M_6: 2(Mg,Fe3+); _M_7: 2(Fe3+,Al); _M_8: 2Ca; _M_9: 2Ca; _T_1: 2(Si,Al); _T_2: 2(Si,Al); _T_3: 2Al; _T_4: 2Si; _T_5: 2(Al,Fe3+); _T_6: 2(Al,Fe3+).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1313:6

aabd2b94-dc6b-44a4-b877-48494b3c17fc

IMA Classification of DorriteHide

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IMA Formula:

Ca4[Mg3Fe3+9]O4[Si3Al8Fe3+O36]

Type description reference:

Classification of DorriteHide

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9.DH.40

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12

69.2.1a.2

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2

16.23.2

16 : Silicates Containing Aluminum and other Metals
23 : Aluminosilicates of Fe, Ca, and Mg

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol Source Reference
Dor IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of DorriteHide

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Colour:

Red-brown, brown-black, dark brown

Cleavage:

Distinct/Good
Good on {010} and {001}.

Fracture:

Irregular/Uneven

Density:

3.059 g/cm3 (Calculated)

Optical Data of DorriteHide

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RI values:

_n_α = 1.820(1) _n_β = 1.840(1) _n_γ = 1.860(1)

2V:

Measured: 90° , Calculated: 88°

δ = 0.040

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X = red-orange brown; Y = yellowish brown; Z = greenish brown.

Chemistry of DorriteHide

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Mindat Formula:

Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)

Idealized formula for Kopeisk material: Ca4Mg4Fe3+8[Al8Si4O20]

Common Impurities:

Ti,Cr,Mn,Na,K

Crystallography of DorriteHide

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Cell Parameters:

a = 10.5 Å, b = 10.89 Å, c = 9.91 Å
α = 106.26°, β = 95.16°, γ = 124.75°

Ratio:

a:b:c = 0.964 : 1 : 0.91

Unit Cell V:

847.91 ų (Calculated from Unit Cell)

Morphology:

As anhedral to prismatic grains, to 0.1 mm; some grains exhibit hopper and skeletal habits

Twinning:

Twinned by two-fold rotation about the pseudomonoclinic [010] axis.

Comment:

Point Group: 1 or 1 . ; Space Group: P1 or P1 .

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
2.971 Å (100)
2.558 Å (80)
2.515 Å (80)
2.125 Å (60)
1.511 Å (30)
1.482 Å (30)
8.1 Å (20)

Geological EnvironmentHide

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Type Occurrence of DorriteHide

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Place of Conservation of Type Material:

University of Michigan, Ann Arbor, Michigan; National Museum of Natural History, Washington, D.C., USA (163357).

Associated Minerals at Type Locality:

Reference:

Cosca, M.A., Rouse, R.R., Essene, E.J. (1988) Dorrite [Ca2(Mg2Fe3+4)(Al4Si2)O20], a new member of the aenigmatite group from a pyrometamorphic melt-rock. American Mineralogist: 73: 1440-1448.

Synonyms of DorriteHide

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Other Language Names for DorriteHide

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Relationship of Dorrite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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9.DH. Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 Mon. 2/m
9.DH. Bavsiite Ba2V2O2[Si4O12] Tet. 4/m : _I_4/m
9.DH. Devilliersite Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] Tric. 1 : _P_1
9.DH. Yuzuxiangite Sr3Fe3+(Si2O6)2(OH) · 3H2O Mon. 2/m : _P_21/m
9.DH. Louisfuchsite Ca2(Mg4Ti2)(Al4Si2)O20 Tric. 1 : _P_1
9.DH.05 Leucophanite NaCaBeSi2O6F Orth. 222 : _P_212121
9.DH.10 Ohmilite Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O Mon. 2/m : _P_21/m
9.DH.15 Haradaite SrVSi2O7 Orth. m m m _(_2/_m_2/_m_2/m )
9.DH.15 Suzukiite BaVSi2O7 Orth.
9.DH.20 Batisite BaNaNaTi2(Si4O12)O2 Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a
9.DH.20 Shcherbakovite (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a
9.DH.20 Noonkanbahite BaKNaTi2(Si4O12)O2 Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a
9.DH.25 Taikanite Sr3BaMn2+2(Si4O12)O2 Mon. 2 : _B_2
9.DH.30 Krauskopfite BaSi2O5 · 3H2O Mon. 2/m : _P_21/b
9.DH.35 Balangeroite (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 Mon. 2/m
9.DH.35 Gageite Mn21(Si4O12)2O3(OH)20 Mon. 2/m
9.DH.40 Aenigmatite Na4[Fe2+10Ti2]O4[Si12O36] Tric. 1 : _P_1
9.DH.40 Høgtuvaite Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] Tric. 1 : _P_1
9.DH.40 Krinovite Na2Mg4Cr3+2(Si6O18)O2 Tric. 1 : _P_1
9.DH.40 Makarochkinite (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] Tric. 1 : _P_1
9.DH.40 Rhönite Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] Tric. 1 : _P_1
9.DH.40 Serendibite Ca4[Mg6Al6]O4[Si6B3Al3O36] Tric. 1 : _P_1
9.DH.40 Welshite Ca4Mg9Sb3O4[Si6Be3AlFe2O36] Tric. 1 : _P_1
9.DH.40 Wilkinsonite Na2Fe2+4Fe3+2(Si6O18)O2 Tric. 1 : _P_1
9.DH.40 Leucorhönite Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 Tric.
9.DH.40 Kuratite Ca2(Fe2+5Ti)O2[Si4Al2O18] Tric. 1 : _P_1
9.DH.40 Khesinite Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 Tric. 1 : _P_1
9.DH.40 UM1991-29-SiO:FeMgNa Na4(Mg5Fe3+7)O4[Si9Fe3+3O36]
9.DH.45 Sapphirine Mg4(Mg3Al9)O4[Si3Al9O36] Mon. 2/m : _P_21/b
9.DH.50 Khmaralite (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 Mon. 2/m : _P_21/b
9.DH.55 Surinamite (Mg,Fe)3Al4BeSi3O16 Mon. 2/m
9.DH.55 UM1988-26-SiO:AlMg Mg4Al2O[Si3Al2O15]
9.DH.60 Deerite Fe2+6Fe3+3(Si6O17)O3(OH)5 Mon. 2/m : _P_21/b
9.DH.65 Howieite Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10 Tric. 1 : _P_1
9.DH.65 Taneyamalite (Na,Ca)Mn2+12(Si,Al)12(O,OH)44 Tric.
9.DH.70 Johninnesite Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 Tric.
9.DH.75 Agrellite NaCa2Si4O10F Tric. 1 : _P_1

Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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References for DorriteHide

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Reference List:

Shchipalkina, N.V., Zubkova, N.V., Pekov, I.V., Koshlyakova, N.N. (2016) Dorrite from Kopeisk, South Urals, Russia: crystal structure and cation ordering. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry, 193, 275-282.

Shchipalkina, Nadezhda V., Pekov, Igor V., Chukanov, Nikita V., Koshlyakova, Natalya N., Ternes, Bernd, Schüller, Willi (2019) Crystal chemistry of dorrite from the Eifel volcanic region, Germany, and chemical variations in the khesinite-dorrite-rhönite-kuratite solid-solution system. Mineralogy and Petrology, 113 (2) 249-259 doi:10.1007/s00710-018-0645-0

Localities for DorriteHide

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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

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- 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.

Germany
Rhineland-Palatinate Ahrweiler Brohltal Wassenach ⓘ Kunkskopf quarry Blaß et al. (2015)
Mayen-Koblenz Mendig Bell ⓘ Rothenberg Quarry Blaß et al. (2015)
Pellenz Nickenich ⓘ Nickenicher Sattel Kunzmann (1999) +1 other reference
ⓘ Nickenicher Weinberg Blaß et al. (2015)
Vordereifel ⓘ Bellerberg volcano Blaß et al. (2015)
Ettringen ⓘ Caspar quarry Shchipalkina et al. (2019)
Vulkaneifel Daun Üdersdorf ⓘ Emmelberg Blaß et al. (2014)
Israel
Southern District (HaDarom District) Tamar Regional Council Hatrurim Basin ⓘ Aravaite type locality Britvin et al. (2021) +1 other reference
ⓘ Halamish wadi (Ẕuq Tamrur) Galuskina IO
Har Parsa (Mt. Parsa) ⓘ Kahlenbergite occurrence Krüger et al. (2021)
Jordan
Amman Governorate Transjordan Plateau Daba-Siwaqa complex Hashem region Lisdan-Siwaga Fault Siwaga ⓘ Tulul al Hammam Khoury et al. (2015) +1 other reference
Middle East
ⓘ Hatrurim Formation Vapnik et al. (2014)
Mongolia
Dornogovi Province Erdene District ⓘ Khamaryn– Khural–Khiid combustion metamorphic complex Savina et al. (2020)
Palestine
West Bank Jericho Governorate ⓘ Nabi Musa Galuskina IO
Russia
Chelyabinsk Oblast ⓘ Chelyabinsk coal basin Cesnokov et al. (1998)
Kopeysk Coal mine No. 45 ⓘ Mine dump Shchipalkina et al. (2016)
USA (TL)
Wyoming Campbell County Reno Junction ⓘ Durham Ranch paralava occurrence (TL) Amer.Min. (1988)
Johnson County Buffalo ⓘ Healy Coal seam American Mineralogist