Oberwolfachite
A valid IMA mineral species
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About Oberwolfachite
Formula:
SrFe3+3(AsO4)(SO4)(OH)6
Colour:
Yellow to brown
Lustre:
Adamantine
Specific Gravity:
3.874 (Calculated)
Crystal System:
Trigonal
Member of:
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).
A Ba analogue is known: Unnamed (Fe-analogue of Weilerite and Ba-analogue of Oberwolfachite).
Unique Identifiers
Mindat ID:
55455
Long-form identifier:
mindat:1:1:55455:2
GUID
(UUID V4):
(UUID V4):
a3b6ca05-9dc5-499c-8daf-ff2aae6553d1
IMA Classification of Oberwolfachite
Approved
Approval year:
2021
First published:
2021
Type description reference:
Chukanov, Nikita V., Möhn, Gerhard, Dal Bo, Fabrice, Zubkova, Natalia V., Varlamov, Dmitry A., Pekov, Igor V., Jouffret, Laurent, Henot, Jean-Marc, Chollet, Pascal, Vessely, Yannick, Friis, Henrik, Ksenofontov, Dmitry A., Agakhanov, Atali A., Britvin, Sergey N., Desor, Joy, Koshlyakova, Natalia N., Pushcharovsky, Dmitry Yu. (2021) Oberwolfachite, SrFe3+3(AsO4)(SO4)(OH)6, a new alunite-supergroup mineral from the Clara mine, Schwarzwald, Germany and Monterniers mine, Rhône, France. Mineralogical Magazine, 85 (5) 808-816 doi:10.1180/mgm.2021.63
Classification of Oberwolfachite
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Obw | 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 Oberwolfachite
Adamantine
Colour:
Yellow to brown
Streak:
Yellow
Cleavage:
Distinct/Good
on {0001}
on {0001}
Density:
3.874 g/cm3 (Calculated)
Chemistry of Oberwolfachite
Mindat Formula:
SrFe3+3(AsO4)(SO4)(OH)6
Crystallography of Oberwolfachite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/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 Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.95 Å | (56) |
3.664 Å | (37) |
3.117 Å | (16) |
3.082 Å | (100) |
2.548 Å | (15) |
2.280 Å | (22) |
1.983 Å | (26) |
1.832 Å | (19) |
Comments:
PXRD data for the holotype material
Type Occurrence of Oberwolfachite
Co-Type Localities:
General Appearance of Type Material:
(1) platy crystals, up to 1 mm across, (2) thick, outer zones of mixed oberwolfachite–beudantite crystals, up to 3 mm across.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5674/1.
Associated Minerals at Type Locality:
Reference:
Chukanov, N.V., Möhn, G., Dal Bo, F., Zubkova, N.V., Varlamov, D.A., Pekov, I.V., Jouffret, L., Henot, J.-M., Chollet, P., Vessely, Y., Friis, H., Ksenofontov, D.A., Agakhanov, A.A., Britvin, S.N., Desor, J., Koshlyakova, N.N., Pushcharovsky, D.Yu. (2021): Oberwolfachite, SrFe3+3(AsO4)(SO4)(OH)6, a new alunite-supergroup mineral from the Clara mine, Schwarzwald, Germany, and Monterniers mine, Rhône, France. Mineralogical Magazine: 85(5), 808-816.
Synonyms of Oberwolfachite
Other Language Names for Oberwolfachite
German:Oberwolfachit
Relationship of Oberwolfachite to other Species
Member of:
Other Members of this group:
Beudantite | PbFe3(AsO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Cloudite | BaFe3+3(PO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Corkite | PbFe3(PO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Gallobeudantite | PbGa3(AsO4)(SO4)(OH)6 | Trig. 3m : R3m |
Hidalgoite | PbAl3(AsO4)(SO4)(OH)6 | Trig. 3m : R3m |
Hinsdalite | PbAl3(PO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Kemmlitzite | SrAl3(AsO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Svanbergite | SrAl3(PO4)(SO4)(OH)6 | Trig. 3m (3 2/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 | |
Weilerite | BaAl3(AsO4)(SO4)(OH)6 | Hex. |
Woodhouseite | CaAl3(PO4)(SO4)(OH)6 | Trig. 3m (3 2/m) : R3m |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
8.BL. | Graulichite-(La) | LaFe3+3(AsO4)2(OH)6 |
8.BL. | Kiryuite | NaMnAl(PO4)F3 |
8.BL. | Cloudite | BaFe3+3(PO4)(SO4)(OH)6 |
8.BL.05 | Beudantite | PbFe3(AsO4)(SO4)(OH)6 |
8.BL.05 | Corkite | PbFe3(PO4)(SO4)(OH)6 |
8.BL.05 | Hidalgoite | PbAl3(AsO4)(SO4)(OH)6 |
8.BL.05 | Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
8.BL.05 | Kemmlitzite | SrAl3(AsO4)(SO4)(OH)6 |
8.BL.05 | Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
8.BL.05 | Weilerite | BaAl3(AsO4)(SO4)(OH)6 |
8.BL.05 | Woodhouseite | CaAl3(PO4)(SO4)(OH)6 |
8.BL.05 | Gallobeudantite | PbGa3(AsO4)(SO4)(OH)6 |
8.BL.05 | UM2011-07-POSO:AlBaH | BaAl3(PO4)(SO4)(OH)6 |
8.BL.10 | Arsenogoyazite | SrAl3(AsO4)(AsO3OH)(OH)6 |
8.BL.10 | Arsenogorceixite | BaAl3(AsO4)(AsO3OH)(OH)6 |
8.BL.10 | Arsenocrandallite | CaAl3(AsO4)(AsO3OH)(OH)6 |
8.BL.10 | Benauite | SrFe3+3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Dussertite | BaFe3+3(AsO4)(AsO3OH)(OH)6 |
8.BL.10 | Eylettersite | Th0.75Al3(PO4)2(OH)6 |
8.BL.10 | Gorceixite | BaAl3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Kintoreite | PbFe3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Philipsbornite | PbAl3(AsO4)(AsO3OH)(OH)6 |
8.BL.10 | Plumbogummite | PbAl3(PO4)(PO3OH)(OH)6 |
8.BL.10 | Segnitite | PbFe3+3AsO4(AsO3OH)(OH)6 |
8.BL.10 va | Viséite | |
8.BL.10 | Springcreekite | BaV3+3(PO4)2(OH,H2O)6 |
8.BL.10 | Galloplumbogummite | Pb(Ga,Al,Ge)3(PO4)2(OH)6 |
8.BL.13 | Arsenoflorencite-(La) | LaAl3(AsO4)2(OH)6 |
8.BL.13 | Arsenoflorencite-(Nd) | NdAl3(AsO4)2(OH)6 |
8.BL.13 | Arsenoflorencite-(Ce) | CeAl3(AsO4)2(OH)6 |
8.BL.13 | Florencite-(Ce) | CeAl3(PO4)2(OH)6 |
8.BL.13 | Florencite-(La) | LaAl3(PO4)2(OH)6 |
8.BL.13 | Florencite-(Nd) | NdAl3(PO4)2(OH)6 |
8.BL.13 | Waylandite | BiAl3(PO4)2(OH)6 |
8.BL.13 | Zaïrite | BiFe3+3(PO4)2(OH)6 |
8.BL.13 | Arsenowaylandite | BiAl3(AsO4)2(OH)6 |
8.BL.13 | Graulichite-(Ce) | CeFe3+3(AsO4)2(OH)6 |
8.BL.13 | Florencite-(Sm) | SmAl3(PO4)2(OH)6 |
8.BL.13 | Unnamed (As-analogue of Zaïrite) | (Bi,Pb)Fe3+3(AsO4)2(OH)6 |
8.BL.15 | Viitaniemiite | Na(Ca,Mn2+)Al(PO4)(F,OH)3 |
8.BL.25 | Pattersonite | PbFe3+3(PO4)2(OH)5 · H2O |
Other Information
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 Oberwolfachite
mindat.org URL:
https://www.mindat.org/min-55455.html
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References for Oberwolfachite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 61. European Journal of Mineralogy, 33 (3) 299-304 doi:10.5194/ejm-33-299-2021
Chukanov, Nikita V., Möhn, Gerhard, Dal Bo, Fabrice, Zubkova, Natalia V., Varlamov, Dmitry A., Pekov, Igor V., Jouffret, Laurent, Henot, Jean-Marc, Chollet, Pascal, Vessely, Yannick, Friis, Henrik, Ksenofontov, Dmitry A., Agakhanov, Atali A., Britvin, Sergey N., Desor, Joy, Koshlyakova, Natalia N., Pushcharovsky, Dmitry Yu. (2021) Oberwolfachite, SrFe3+3(AsO4)(SO4)(OH)6, a new alunite-supergroup mineral from the Clara mine, Schwarzwald, Germany and Monterniers mine, Rhône, France. Mineralogical Magazine, 85 (5) 808-816 doi:10.1180/mgm.2021.63
Localities for Oberwolfachite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Chukanov et al. (2021) |
Germany (TL) | |
| Miyawaki et al. (2021) +1 other reference |
Greece | |
| 54 (in German) +2 other references |
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Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany