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Oberwolfachite

A valid IMA mineral species
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02754040017272473379032.jpg
Oberwolfachite, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
01899400017272049976487.jpg
Oberwolfachite

Monterniers Mines, Lantignié, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France
03524160017272011984254.jpg
Oberwolfachite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02754040017272473379032.jpg
Oberwolfachite, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
09472110017272473373629.jpg
Oberwolfachite

Monterniers Mines, Lantignié, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France
05873810017272011901086.jpg
Oberwolfachite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02754040017272473379032.jpg
Oberwolfachite, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
01899400017272049976487.jpg
Oberwolfachite

Monterniers Mines, Lantignié, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France
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About OberwolfachiteHide

Formula:
SrFe3+3(AsO4)(SO4)(OH)6
Colour:
Yellow to brown
Lustre:
Adamantine
Specific Gravity:
3.874 (Calculated)
Crystal System:
Trigonal
Name:
Named after the type locality - the famous Clara mine that is in Oberwolfach (Black Forest, Germany).
The Sr analogue of beudantite. The Fe analogue of kemmlitzite. Unique combination of elements (at the upload time).

A Ba analogue is known: Unnamed (Fe-analogue of Weilerite and Ba-analogue of Oberwolfachite).


Unique IdentifiersHide

Mindat ID:
55455
Long-form identifier:
mindat:1:1:55455:2

IMA Classification of OberwolfachiteHide

Classification of OberwolfachiteHide

Strunz-mindat (2026):
8.BL.

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1

Mineral SymbolsHide

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

SymbolSourceReference for Standard
ObwIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of OberwolfachiteHide

Lustre:
Adamantine
Colour:
Yellow to brown
Streak:
Yellow
Cleavage:
Distinct/Good
on {0001}
Density:
3.874 g/cm3 (Calculated)

Chemistry of OberwolfachiteHide

Mindat Formula:
SrFe3+3(AsO4)(SO4)(OH)6
Element Weights:
Element% weight
O37.825 %
Fe28.291 %
Sr14.796 %
As12.652 %
S5.415 %
H1.021 %

Calculated from ideal end-member formula.
O
Fe
Sr
As
S
H
Elements listed:
As, Fe, H, O, S, Sr - search for minerals with similar chemistry

Crystallography of OberwolfachiteHide

Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 7.3270(3) Å, c = 17.0931(9) Å
Ratio:
a:c = 1 : 2.333
Unit Cell V:
794.7 ų
Morphology:
Platy crystals up to 1 mm across; outer zones of mixed (oberwolfachite–beudantite) crystals up to 3 mm across
Comment:
The above unit-cell parameters are those of the holotype sample; cotype data: a = 7.298(2) Å, c = 16.908(3) Å.

X-Ray Powder DiffractionHide

Type Occurrence of OberwolfachiteHide

Synonyms of OberwolfachiteHide

Other Language Names for OberwolfachiteHide

Relationship of Oberwolfachite to other SpeciesHide

Member of:
Beudantite Group > Alunite Supergroup
Other Members of Beudantite Group:
BeudantitePbFe3+3(AsO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
ClouditeBaFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
CorkitePbFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
GallobeudantitePbGa3(AsO4)(SO4)(OH)6Trig. 3m : R3m
HidalgoitePbAl3(AsO4)(SO4)(OH)6Trig. 3m : R3m
HinsdalitePbAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
KemmlitziteSrAl3(AsO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
SlottaiteSrFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
SvanbergiteSrAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
'UM2011-07-POSO:AlBaH'BaAl3(PO4)(SO4)(OH)6
'Unnamed (Fe-analogue of Weilerite and Ba-analogue of Oberwolfachite)'BaFe3(AsO4)(SO4)(OH)6
WeileriteBaAl3(AsO4)(SO4)(OH)6Hex.
WoodhouseiteCaAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Oberwolfachite associated with QuartzSiO2
4 photos of Oberwolfachite associated with GoethiteFe3+O(OH)
2 photos of Oberwolfachite associated with ChenevixiteCu2Fe3+2(AsO4)2(OH)4

Related Minerals - Strunz-mindat GroupingHide

8.BL.KiryuiteNaMnAl(PO4)F3Mon. 2/m : P21/m
8.BL.MetaheimitePbCu2(AsO4)(OH)3Mon. 2/m : P21/b
8.BL.Graulichite-(La)LaFe3+3(AsO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.ClouditeBaFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.ArsenobenauiteSrFe3+3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.05GallobeudantitePbGa3(AsO4)(SO4)(OH)6Trig. 3m : R3m
8.BL.05SlottaiteSrFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05CorkitePbFe3+3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05HidalgoitePbAl3(AsO4)(SO4)(OH)6Trig. 3m : R3m
8.BL.05HinsdalitePbAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05'UM2011-07-POSO:AlBaH'BaAl3(PO4)(SO4)(OH)6
8.BL.05KemmlitziteSrAl3(AsO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05BeudantitePbFe3+3(AsO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05WeileriteBaAl3(AsO4)(SO4)(OH)6Hex.
8.BL.05WoodhouseiteCaAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.05SvanbergiteSrAl3(PO4)(SO4)(OH)6Trig. 3m(32/m) : R3m
8.BL.10SegnititePbFe3+3AsO4(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10ArsenogorceixiteBaAl3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10DussertiteBaFe3+3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10GalloplumbogummitePb(Ga,Al,Ge)3(PO4)2(OH)6Trig. 3m : R3m
8.BL.10StibiosegnititePb(Fe3+2.5Sb5+0.5)(AsO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.10 va'Viséite'
8.BL.10ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m)
8.BL.10BenauiteSrFe3+3(PO4)(PO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10PhilipsbornitePbAl3(AsO4)(AsO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10CrandalliteCaAl3(PO4)(PO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10SpringcreekiteBaV3+3(PO4)2(OH,H2O)6Trig. 3m(32/m) : R3m
8.BL.10EylettersiteTh0.75Al3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.10KintoreitePbFe3(PO4)(PO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10PlumbogummitePbAl3(PO4)(PO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6Mon. m : Bm
8.BL.10GoyaziteSrAl3(PO4)(PO3OH)(OH)6Trig. 3m(32/m) : R3m
8.BL.13Florencite-(Ce)CeAl3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13Florencite-(La)LaAl3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13Florencite-(Nd)NdAl3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13ZaïriteBiFe3+3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13'Arsenoflorencite-(Nd)'NdAl3(AsO4)2(OH)6Trig.
8.BL.13'Unnamed (As-analogue of Zaïrite)'(Bi,Pb)Fe3+3(AsO4)2(OH)6
8.BL.13Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13Graulichite-(Ce)CeFe3+3(AsO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13'Arsenowaylandite'BiAl3(AsO4)2(OH)6Trig.
8.BL.13WaylanditeBiAl3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.13Florencite-(Sm)SmAl3(PO4)2(OH)6Trig. 3m(32/m) : R3m
8.BL.15ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3Mon. 2/m : P21/m
8.BL.25PattersonitePbFe3+3(PO4)2(OH)5 · H2OTric. 1 : P1

Other InformationHide

IR Spectrum:
spectra available
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 OberwolfachiteHide

References for OberwolfachiteHide

Localities for OberwolfachiteHide

Showing 4 localities.

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.
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Locality ListHide

- 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.
France (TL)
 
  • Auvergne-Rhône-Alpes
    • Rhône
      • Villefranche-sur-Saône
        • Lantignié
Chukanov et al. (2021)
Germany (TL)
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Miyawaki et al. (2021) +1 other reference
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
          • Kamariza mines (Kamareza mines)
van Kalmthout et al. (2022) +1 other reference
Spain
 
  • Andalusia
    • Almería
      • Tíjola
D. Luis Arrufat Milan (Universidad de Murcia)
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