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Povondraite

Big Photo

Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia
© Knut Eldjarn

Formula:
[Na][Fe
3+
3
][Fe
3+
6
][O
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
System:TrigonalColour:Dark brown to brownish ...
Lustre:ResinousHardness:7
Name:Named for Pavel Povondra (b. 1924-), mineralogist at the Charles University, Prague, Czech Republic
This page provides mineralogical data about Povondraite.

Classification of Povondraite

IMA status:Approved
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
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Type Occurrence of Povondraite

Type Locality:Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia
Year of Discovery:1993

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:
[Na][Fe
3+
3
][Fe
3+
6
][O
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
Essential elements:B, Fe, H, Na, O, Si
All elements listed in formula:B, Fe, H, Na, O, Si
Common Impurities:K,Mg,Al,Cu,Pb,Sn,Ti,V,H2O

Relationship of Povondraite to other Species

Member of:Tourmaline Group
Related Minerals - Nickel-Strunz Grouping):
9.CK.05Buergerite
[Na][Fe
3+
3
][Al
 
6
][O
 
3
|F|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Chromdravite
[Na][Mg
 
3
][(Cr
3+
 
,Fe
3+
 
)
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Dravite
[Na][Mg
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Elbaite
[Na][(Li,Al)
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Feruvite
[Ca][(Fe
2+
 
 ,Mg)
 
3
][MgAl
 
5
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Foitite
[ ][Fe
2+
2
(Al,Fe
3+
 
)][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Liddicoatite
[Ca][Li
 
2
Al][Al
 
6
][(OH)
 
3
|F|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Olenite
([ ],Na)[(Al,Li)
 
3
][Al
 
6
][(O,OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Schorl
[Na][Fe
2+
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Uvite
[Ca][(Mg,Fe
2+
 
)
 
3
][MgAl
 
5
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Magnesiofoitite
[ ][Mg
 
2
(Al,Fe
3+
 
 )][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Rossmanite
[ ][LiAl
 
2
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
9.CK.05Vanadiumdravite
[Na][Mg
 
3
][V
3+
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
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
(BO
 
3
)
 
3
[Si
 
6
O
 
18
](OH)
 
3
(O)
9.CK.10Abenakiite-(Ce)
Na
 
26
Ce
 
6
[O|SO
 
2
|(CO
 
3
)
 
6
|(PO
 
4
)
 
6
|Si
 
6
O
 
18
]
9.CK.15Scawtite
Ca
 
7
Si
 
6
(CO
 
3
)O
 
18
·2H
 
2
O
9.CK.20Steenstrupine-(Ce)
Na
 
14
Mn
2+
2
(Fe
3+
 
,Mn
3+
 
)
 
2
Ce
 
6
(Zr,Th)[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
6
|(Si
 
6
O
 
18
)
 
2
]·2H
 
2
O
9.CK.20Thorosteenstrupine
CaMnThSi
 
4
O
 
11
(OH)F·6H
 
2
O
Related Minerals - Dana Grouping):
61.3.1.1Foitite
[ ][Fe
2+
2
(Al,Fe
3+
 
)][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.2Magnesiofoitite
[ ][Mg
 
2
(Al,Fe
3+
 
 )][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.3Rossmanite
[ ][LiAl
 
2
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.4Liddicoatite
[Ca][Li
 
2
Al][Al
 
6
][(OH)
 
3
|F|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.5Uvite
[Ca][(Mg,Fe
2+
 
)
 
3
][MgAl
 
5
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.6Feruvite
[Ca][(Fe
2+
 
 ,Mg)
 
3
][MgAl
 
5
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.7Buergerite
[Na][Fe
3+
3
][Al
 
6
][O
 
3
|F|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.9Olenite
([ ],Na)[(Al,Li)
 
3
][Al
 
6
][(O,OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.10Elbaite
[Na][(Li,Al)
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.11Dravite
[Na][Mg
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.12Schorl
[Na][Fe
2+
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.13Chromdravite
[Na][Mg
 
3
][(Cr
3+
 
,Fe
3+
 
)
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
61.3.1.14Vanadiumdravite
[Na][Mg
 
3
][V
3+
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]

Other Names for Povondraite

Synonyms:
FerridraviteFerri-Eisen-TurmalinIMA1978-075
German names:
FerridravitPovondrait
Japanese names:
ポヴォンドラ電気石
Russian names:
Повондраит
Spanish names:
FerridravitaPovondraita

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:American Mineralogist (1979): 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.

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 ofn the Czech Geological Society: 43: 59-67.

Journal of the Czech Geological Society, Prague (2000): 45: 3-12.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Povondraite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Povondraite in the Natural History Museum (London) online catalogue
  • Povondraite details from Handbook of Mineralogy (PDF)
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    • Localities for Povondraite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    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.
    Austria
     
    • Styria
      • Packalpe Mts
        • Pack
          • Pegmatite outcrops
    		B. Moser, H. P. Bojar: Carinthia II 192./112.:216-217 (2002)
    Bolivia
     
    • Cochabamba Department
      • 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.
    (erroneously attributed to this mine in the type description)
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Coronel Murta
          • Barra de Salinas
    		[MinRec 33:209]
    Mineral and/or Locality
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