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Kummerite

A valid IMA mineral species
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Named for Rudolf Kummer (1924-1982), mining director of the Cornelia mine at Hagendorf Süd from 1964 until his death in 1982. Rudi had a great appreciation of, and familiarity with the mineral occurrences at the mine and he was very supportive of geologists, mineralogists and collectors who came to study and collect samples from the mine.
Type Locality:
ⓘHagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany
Isostructural with:
Laueite
Chemically similar torittmannite.

A difference from laueite: Al and Fe3+ are ordered into alternate octahedral sites within chains.


Unique Identifiers
Approval year:
2015
First published:
2016

Classification of Kummerite

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and< 2:1

Mineral Symbols
Transparency:
Translucent
Colour:
Amber yellow
Streak:
White
Tenacity:
Brittle
Cleavage:
Distinct/Good
Parallel to {010}
Fracture:
Irregular/Uneven
Density:
2.34 g/cm3 (Calculated)

Optical Data of Kummerite
Surface Relief:
Moderate
Dispersion:
weak
Pleochroism:
Weak
Comments:
amber yellow

Chemistry of Kummerite
Common Impurities:
Mg,Fe(II),(Zn)

Crystallography of Kummerite
General Appearance of Type Material:
Aggregates are commonly 100 to 500 µm in their longest dimension, but the individual lamellae, parallel to {010} have a thickness of the order of a few µm
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Museum Victoria, Melbourne, Victoria, Australia, registration number M53448
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
BerauniteFrondeliteJahnsite-(CaMnMn)Zwieselite

Synonyms of Kummerite

Other Language Names for Kummerite

Relationship of Kummerite to other Species
Other Members of Laueite Group:
FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P1
GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 :P1
Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric.1 :P1
LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P1
MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.1 :P1
ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric.1 :P1
SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric.1 :P1
StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P1
UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.1 :P1

Common AssociatesTric.1 :P18.DC.FerrivauxiteFe3+Al2(PO4)2(OH)3 · 5H2OTric.1 :P18.DC.IanbruceiteZn2(AsO4)(OH) · 3H2OMon. 2/m :P21/b8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon. 2/m :B2/b8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 222 :P2121218.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m :P21/b8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15UM2006-27-PO:FeHZnZnFe3+2(PO4)2(OH)2 · 4H2OMon.8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3+2(PO4)2(OH)2 · 4H2O8.DC.15CobaltarthuriteCoFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m :P21/b8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.8.DC.20MagnesiobermaniteMgMn3+2(PO4)2(OH)2 · 4H2OMon. 2 :P218.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m :P2/b8.DC.20CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 :P18.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon. 2/m :P21/b8.DC.25ZincostrunziteZnFe3+2(PO4)2(OH)2 · 6.5H2OTric.1 :P18.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m :P21/b8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.1 :P18.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric.1 :P18.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.8.DC.27BerauniteFe3+6(PO4)4O(OH)4 · 6H2OMon.m :Bb8.DC.27TvrdýiteFe2+Fe3+2Al3(PO4)4(OH)5(H2O)4 · 2H2OMon. 2/m :B2/b8.DC.27ZincoberauniteZnFe3+5(PO4)4(OH)5 · 6H2OMon. 2/m :B2/b8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric.1 :P18.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric.1 :P18.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2OTric.1 :P18.DC.30Kayrobertsonite[MnAl2(PO4)2(OH)2(H2O)4] · 2H2OTric.1 :P18.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 :P18.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric.1 :P18.DC.30PseudolaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OMon. 2/m :P21/b8.DC.32KamarizaiteFe3+3(AsO4)2(OH)3 · 3H2OTric.1 :P18.DC.32TinticiteFe3+3(PO4)2(OH)3 · 3H2OTric.1 :P18.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric.1 :P18.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m :P63/m8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.18.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m :P21/m8.DC.50FluorwavelliteAl3(PO4)2(OH)2F · 5H2OOrth.mmm(2/m2/m2/m)8.DC.50WavelliteAl3(PO4)2(OH)3 · 5H2OOrth.mmm(2/m2/m2/m)8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric.1 :P18.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.m :Bm8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth.mmm(2/m2/m2/m) :Cmmm8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m :P21/b8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth.mmm(2/m2/m2/m)8.DC.62KenngottiteMn2+3Fe3+4(PO4)4(OH)6(H2O)2Mon. 2/m :P2/b8.DC.67MolinelloiteCu(H2O)(OH)V4+O(V5+O4)Tric.1 :P18.DC.70WhitecapsiteH16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2OHex. 6/m :P63/m8.DC.75HeimitePbCu2(AsO4)(OH)3 · 2H2OMon. 2/m8.DC.80LedneviteCu[PO3(OH)] · H2OMon. 2/m :P21/b

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    • References for KummeriteⓘSapucaia mineSergio Varvello collection
    Germany (TL)
     
    Hålenius et al. (2015)+2 other references
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