Mindat Logo

Povondraite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
NaFe
3+
3
(Mg
 
2
Fe
3+
4
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
System:TrigonalColour:Dark brown to brownish ...
Lustre:ResinousHardness:7
Member of:Tourmaline Group
Name:Named for Pavel Povondra (b. 1924-), mineralogist at Charles University, Prague, Czech Republic.


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.

Visit gemdat.org for gemological information about Povondraite. Currently in public beta-test.

Classification of Povondraite

IMA status:Redefined Approved 1990
Strunz 8th edition ID:8/E.19-75
Nickel-Strunz 10th (pending) edition ID:9.CK.05

9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
Dana 7th edition ID:61.3.1.8
Dana 8th edition ID:61.3.1.6

61 : CYCLOSILICATES Six-Membered Rings
3 : Six-Membered Rings with borate groups
mindat.org URL:http://www.mindat.org/min-3274.html
Please feel free to link to this page.

Type Occurrence of Povondraite

Type Locality:Cristalmayu valley, Cristalmayu, Cristalmayu subdistrict, Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia
Place of Conservation of Type Material:Smithsonian
Year of Discovery:1979

Occurrences of Povondraite

Geological Setting:Saltdome caprock

Physical Properties of Povondraite

Lustre:Resinous
Colour:Dark brown to brownish black
Streak:Brown
Hardness (Mohs):7
Cleavage:None Observed

Crystallography of Povondraite

Crystal System:Trigonal
Cell Parameters:a = 16.18Å, c = 7.44Å
Ratio:a:c = 1 : 0.46
Unit Cell Volume:V 1,686.79 ų (Calculated from Unit Cell)

Optical Data of Povondraite

Type:Uniaxial (-)
RI values: nω = 1.820 nε = 1.751
Maximum Birefringence:δ = 0.069

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Povondraite

Formula:
NaFe
3+
3
(Mg
 
2
Fe
3+
4
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Simplified for copy/paste:NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
Essential elements:B, Fe, H, Mg, Na, O, Si
All elements listed in formula:B, Fe, H, Mg, Na, O, Si
Common Impurities:K,Mg,Al,Cu,Pb,Sn,Ti,V,H2O

Relationship of Povondraite to other Species

Member of:Tourmaline Group
Other Members of Group:

- +
Adachiite
Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Chromo-alumino-povondraite
Na(Cr
 
3
)(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Darrellhenryite
Na(LiAl
 
2
)Al
 
6
(BO
 
3
)
 
3
Si
 
6
O
 
18
(OH)
 
3
O
Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
Fluor-dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Foitite
(□,Na)(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
OH
Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Luinaite-(OH)
Na(Fe
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Magnesiofoitite
(□,Na)(Mg
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Maruyamaite
K(MgAl
 
2
)(Al
 
5
Mg)(BO
 
3
)
 
3
(Si
 
6
O
 
18
)(OH)
 
3
O
Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
Oxy-chromium-dravite
Na(Cr)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-dravite
Na(MgAl
 
2
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-schorl
Na(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-vanadium-dravite
Na(V)
 
3
(V
 
4
Mg
 
2
)Si
 
6
O
 
18
(BO
 
3
)
 
3
(OH)
 
3
O
Rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
UM2000-64-SiO:BFeHKMg
K, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)
(Pb,Na)(Li,Al)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F,OH)
Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
Vanadio-oxy-chromium-dravite
Na(V)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Vanadio-oxy-dravite
NaV
 
3
(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Related Minerals - Nickel-Strunz Grouping):

- +
9.CK.Fluor-schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
9.CK.05Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
9.CK.05Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Foitite
(□,Na)(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
OH
9.CK.05Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
9.CK.05Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Magnesiofoitite
(□,Na)(Mg
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
9.CK.05Oxy-vanadium-dravite
Na(V)
 
3
(V
 
4
Mg
 
2
)Si
 
6
O
 
18
(BO
 
3
)
 
3
(OH)
 
3
O
9.CK.05Oxy-dravite
Na(MgAl
 
2
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
9.CK.05Oxy-rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
9.CK.05Chromo-alumino-povondraite
Na(Cr
 
3
)(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
9.CK.05Fluor-dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
9.CK.05Fluor-uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
9.CK.10Abenakiite-(Ce)
Na
 
26
Ce
 
6
(Si
 
6
O
 
18
)(PO
 
4
)
 
6
(CO
 
3
)
 
6
(SO
 
2
)O
9.CK.15Scawtite
Ca
 
7
(Si
 
3
O
 
9
)
 
2
CO
 
3
· 2H
 
2
O
9.CK.20Steenstrupine-(Ce)
Na
 
14
Mn
2+
2
(Fe
3+
 
,Mn
3+
 
)
 
2
Ce
 
6
(Zr,Th)(Si
 
6
O
 
18
)
 
2
(PO
 
4
)
 
6
(HPO
 
4
)(OH)
 
2
· 2H
 
2
O
9.CK.20Thorosteenstrupine
CaMnThSi
 
4
O
 
11
(OH)F · 6H
 
2
O
Related Minerals - Dana Grouping):

- +
61.3.1.1Foitite
(□,Na)(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
OH
61.3.1.2Magnesiofoitite
(□,Na)(Mg
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.3Rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.4Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.5Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
61.3.1.5Fluor-uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
61.3.1.6Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.7Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
61.3.1.9Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
61.3.1.10Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.11Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.12Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.13Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
61.3.1.14Oxy-vanadium-dravite
Na(V)
 
3
(V
 
4
Mg
 
2
)Si
 
6
O
 
18
(BO
 
3
)
 
3
(OH)
 
3
O

Other Names for Povondraite

Synonyms:
FerridraviteFerri-Eisen-TurmalinIMA1978-075
Other Languages:
German:Ferridravit
Povondrait
Japanese:ポヴォンドラ電気石
Russian:Повондраит
Spanish:Ferridravita
Povondraita

Other Information

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

References for Povondraite

Reference List:

- +
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.

Best Localities for Povondraite

Best of Species:Povondraite

Internet Links for Povondraite

Search Engines:
  • Look for Povondraite on Google
  • Look for Povondraite images on Google
  • External Links:
  • Povondraite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • rare and unusual minerals mainly crystallized
  • Fine Minerals from Weinrich Minerals, Inc.
  • Fine and rare minerals from mintreasure.com
  • Lapis Mineral Magazin
  • Search for Povondraite on Well-Arranged Molecules
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Povondraite specimens for sale - minfind.com
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
  • Top quality minerals from Kristalle of California
  • Buy minerals from YourMineralCollection
  • Localities for Povondraite

    The 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.
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: August 22, 2014 16:58:32
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds