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Povondraite

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About PovondraiteHide

Formula:
NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
Colour:
Dark brown to brownish black
Lustre:
Resinous
Hardness:
7
Crystal System:
Trigonal
Name:
Named in honor of Pavel Povondra (7 December 1924, Žamberk - 9 September 2013), mineralogist at Charles University, Prague, Czech Republic for his extensive work on the chemistry of the tourmaline group.
Povondraite was redefined (IMA 90-E) from the original “ferridravite” (Walenta and Dunn 1979) because the initially assumed site assignments were incorrect and did not correspond to the Fe3+-equivalent of dravite (Grice et al. 1993). Hawthorne and Henry (1999) suggested that Mg is ordered at the Z site and should be part of the end-member formula.

The type locality was originally given imprecisely as the San Francisco mine, but povondraite does not occur in the asbestos mine itself but rather in the rock unit known as the Locotal Breccia, several hundred meters from the asbestos ore veins.

Visit gemdat.org for gemological information about Povondraite.


Classification of PovondraiteHide

Approved
IMA status notes:
Renamed by the IMA
Approval history:
Renamed by IMA: 1990
9.CK.05

9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
Dana 7th ed.:
61.3.1.8
61.3.1.6

61 : CYCLOSILICATES Six-Membered Rings
3 : Six-Membered Rings with borate groups

Physical Properties of PovondraiteHide

Resinous
Colour:
Dark brown to brownish black
Streak:
Brown
Hardness:
Cleavage:
None Observed

Optical Data of PovondraiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.820 nε = 1.751
Max Birefringence:
δ = 0.069
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of PovondraiteHide

Formula:
NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
IMA Formula:
NaFe3+3(Fe3+4Mg2)(Si6O18)(BO3)3(OH)3O
Common Impurities:
K,Mg,Al,Cu,Pb,Sn,Ti,V,H2O

Crystallography of PovondraiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 16.18 Å, c = 7.44 Å
Ratio:
a:c = 1 : 0.46
Unit Cell V:
1,686.79 ų (Calculated from Unit Cell)
Z:
3

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0001555PovondraiteGrice J D, Ercit T S, Hawthorne F C (1993) Povondraite, a redefinition of the tourmaline ferridravite American Mineralogist 78 433-4361993San Francisco mine, Villa Tunari, Bolivia0293
0018783PovondraiteGrice J D, Ercit T S (1993) Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Neues Jahrbuch fur Mineralogie, Abhandlungen 165 245-2661993San Francisco mine, Villa Tu nari, Bolivia0293
CIF Raw Data - click here to close

Geological EnvironmentHide

Geological Setting:
Saltdome caprock

Type Occurrence of PovondraiteHide

Synonyms of PovondraiteHide

Other Language Names for PovondraiteHide

Relationship of Povondraite to other SpeciesHide

Other Members of this group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Alumino-oxy-rossmaniteAl3Al6(Si5AlO18)(BO3)3(OH)3OTrig. 3m : R3m
BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Celleriite◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O Trig. 3m : R3m
DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
DutrowiteNa(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-feruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-schorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-uviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Foitite(◻,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OHTrig. 3m : R3m
LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
LucchesiiteCaFe2+3 Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Mon. m : Bm
Magnesio-foitite(◻,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Magnesio-lucchesiiteCaMg3Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
MaruyamaiteK(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3OTrig. 3m : R3m
OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig. 3m : R3m
Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-foitite◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m (3 2/m) : R3m
Oxy-rossmanite◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O
Oxy-schorlNa(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-uviteCaMg3Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3OTrig. 3m : R3m
PrincivalleiteNa(Mn2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Rossmanite◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
UM2000-64-SiO:BFeHKMg(K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O
UM2008-52-SiO:AlBCaFFeHLiMgNa(Ca,Na,◻)(Al,Li,Fe,Mg)3Al6[Si6O18](BO3)3(OH,O)3(F,O)
Unnamed (Pb-analogue of Fluor-liddicoatite)(Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH)
UviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Vanadio-oxy-chromium-draviteNa(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Povondraite associated with MicroclineK(AlSi3O8)

Related Minerals - Nickel-Strunz GroupingHide

9.CK.Fluor-schorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O Trig. 3m : R3m
9.CK.AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.Celleriite◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.Alumino-oxy-rossmaniteAl3Al6(Si5AlO18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
9.CK.05Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Foitite(◻,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OHTrig. 3m : R3m
9.CK.05LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig. 3m : R3m
9.CK.05SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Magnesio-foitite(◻,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Rossmanite◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Oxy-rossmanite◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O
9.CK.05Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)Mon. m : Bm
9.CK.05Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Oxy-schorlNa(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
9.CK.05Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Vanadio-oxy-chromium-draviteNa(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
9.CK.05Fluor-uviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.10Abenakiite-(Ce)Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)OTrig. 3 : R3
9.CK.15ScawtiteCa7(Si3O9)2CO3 · 2H2OMon. 2/m
9.CK.20Steenstrupine-(Ce)Na14Mn2+2Fe3+2Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2OTrig.
9.CK.20Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O

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

61.3.1.1Foitite(◻,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OHTrig. 3m : R3m
61.3.1.2LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
61.3.1.3Fluor-uviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
61.3.1.4FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
61.3.1.5Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
61.3.1.7OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig. 3m : R3m
61.3.1.8ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
61.3.1.9DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
61.3.1.10SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
61.3.1.11Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m

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 PovondraiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Walenta, K. & Dunn, P. J. (1979): Ferridravite, a new mineral of the tourmaline group from Bolivia. American Mineralogist, 64, 945-948.
Grice, J.D., T.S. Ercit, and F.C. Hawthorne (1993): Povondraite, a redefinition of the tourmaline ferridravite. American Mineralogist 78, 433-436.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
New Minerals (1997), New Minerals 1990-1994.
Zacek, V., Petrov, A., and Hyrsl, J. (1998): Chemistry and origin of povondraite-bearing rocks from Alto Chapare, Cochabamba, Bolivia. Journal of the Czech Geological Society 43, 59-67.
Žáček, V., Frýda, J., Petrov, A. and Hyršl, J. (2000): Tourmalines of the povondraite-(oxy)dravite series from the caps rocks of meta-evaporite in Alto Chapare, Cochamba, Bolivia. Journal of the Czech Geological Society, 45, 3-12.

Internet Links for PovondraiteHide

Localities for PovondraiteHide

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.
Australia
 
  • New South Wales
    • Argyle Co.
Jones, B. G., Carr, P. F. & Condliffe, E. (1981): Ferrian tourmaline from Bungonia, New South Wales. Journal of the Geological Society of Australia 28, 13-17.
  • Western Australia
    • Upper Gascoyne Shire
      • Yinnietharra
Fetherston, J.M., Stocklmayer, S.M., Stocklmayer, V.C. (2013) Gemstones of Western Australia. Geological Survey of Western Australia, Mineral Resources Bulletin 25, 306 pages.
        • Tomkap tourmaline mines (Soklich)
T Kapitany (pers comm)
Austria
 
  • Styria
    • Voitsberg District
      • Hirschegg-Pack
        • Pack
          • Pegmatite outcrops
B. Moser, H. P. Bojar: Carinthia II 192./112.:216-217 (2002)
Bolivia
 
  • Cochabamba
    • Chapare Province
Mineralogical Record: 32: 461; Zacek, V., Petrov, A., and Hyrsl, J. (1998), Chemistry and origin of povondraite-bearing rocks from Alto Chapare, Cochabamba, Bolivia. Journal of the Czech Geological Society: 43: 59-67.
        • Cristalmayu subdistrict
          • Cristalmayu
(erroneously attributed to San Francisco mine in the type description)
(erroneously attributed to this mine in the type description)
Brazil
 
  • Minas Gerais
    • Coronel Murta
      • Barra do Salinas
erroneously reported [MinRec 33:209]
Russia
 
  • Chukotka Autonomous Okrug
    • Bilibinsky District
      • Vesenniy
Mineralogy of the Peschanka porphyry copper deposit, Chukchi Peninsula, Russia. in Abdurrahman, A., J. C. Ø. Andersen, and B. J. Williamson. "Meeting of the Geological Society’s Mineral Deposits Studies Group was held on the 2nd–4th January 2013 at the University of Leicester, UK." Applied Earth Science (Trans. Inst. Min. Metall. B) 121.4 (2012): 190-191.
    • Chaunskii District (Chaun)
      • Ilirney ore district
Nikolaev, Y. N., Prokof’ev, V. Y., Apletalin, A. V., Vlasov, E. A., Baksheev, I. A., Kal’ko, I. A., & Komarova, Y. S. (2013). Gold-telluride mineralization of the Western Chukchi Peninsula, Russia: mineralogy, geochemistry, and formation conditions. Geology of Ore Deposits, 55(2), 96-124.
  • Zabaykalsky Krai
    • Vershino-Darasunskiy
Baksheev, I. A., Prokofiev, V. Y., Trumbull, R., Wiedenbeck, M., Yapaskurt, V. O. (2015): Geochemical evolution of tourmaline in the Darasun gold district deposits, Transbaikal region, Russia: Evidence from chemical and boron isotope compositions in tourmaline. Mineralium Deposita, 50, 125-138.
Baksheev, I. A., Prokofiev, V. Y., Trumbull, R., Wiedenbeck, M., Yapaskurt, V. O. (2015): Geochemical evolution of tourmaline in the Darasun gold district deposits, Transbaikal region, Russia: Evidence from chemical and boron isotope compositions in tourmaline. Mineralium Deposita, 50, 125-138.
Baksheev, I. A., Prokofiev, V. Y., Trumbull, R., Wiedenbeck, M., Yapaskurt, V. O. (2015): Geochemical evolution of tourmaline in the Darasun gold district deposits, Transbaikal region, Russia: Evidence from chemical and boron isotope compositions in tourmaline. Mineralium Deposita, 50, 125-138.
Slovakia
 
  • Bratislava Region
    • Bratislava
- Bačík P., Uher P., Sýkora M., Lipka J., 2008: Low-Al tourmalines of the schorl-dravite - povondraite series in redeposited tourmalinites from the Western Carpathians, Slovakia. Canadian Mineralogist, 46, 5, 1117-1129.
        • Devín
- Bačík P., Uher P., Sýkora M., Lipka J., 2008: Low-Al tourmalines of the schorl-dravite - povondraite series in redeposited tourmalinites from the Western Carpathians, Slovakia. Canadian Mineralogist, 46, 5, 1117-1129.
USA
 
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Ogdensburg
Robert Jemkins; FrOg On-line #1998-06
 
Mineral and/or Locality  
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