Povondraite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Povondraite
Formula:
NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
Colour:
Dark brown to brownish black
Lustre:
Resinous
Hardness:
7
Specific Gravity:
3.26
Crystal System:
Trigonal
Member of:
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.
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.
Unique Identifiers
Mindat ID:
3274
Long-form identifier:
mindat:1:1:3274:8
GUID
(UUID V4):
(UUID V4):
1c0e55ac-3677-4bec-b4b0-9fc107c6d09e
IMA Classification of Povondraite
Approved
IMA status notes:
Renamed by the IMA
IMA Formula:
NaFe3+3(Fe3+4Mg2)(Si6O18)(BO3)3(OH)3O
First published:
1979
Approval history:
Renamed by IMA: 1990
Classification of Povondraite
9.CK.05
9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
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
61 : CYCLOSILICATES Six-Membered Rings
3 : Six-Membered Rings with borate groups
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Pov | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pov | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Povondraite
Resinous
Transparency:
Opaque
Colour:
Dark brown to brownish black
Comment:
Light is transmitted only in thin splinters.
Streak:
Brown
Hardness:
7 on Mohs scale
Cleavage:
None Observed
Density:
3.26(3) g/cm3 (Measured) 3.33 g/cm3 (Calculated)
Optical Data of Povondraite
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.
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Strong
Comments:
E : light brown and O: dark brown, blackish brown to opaque.
Chemistry of Povondraite
Mindat Formula:
NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
Common Impurities:
K,Mg,Al,Cu,Pb,Sn,Ti,V,H2O
Crystallography of Povondraite
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
Morphology:
Equant and simple. Crystals are comprised of the second-order hexagonal prism {1120} and the trigonal pyramids, {1011} and {2021}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0001555 | Povondraite | Grice J D, Ercit T S, Hawthorne F C (1993) Povondraite, a redefinition of the tourmaline ferridravite American Mineralogist 78 433-436 | 1993 | San Francisco mine, Villa Tunari, Bolivia | 0 | 293 | |
0018783 | Povondraite | Grice J D, Ercit T S (1993) Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Neues Jahrbuch fur Mineralogie, Abhandlungen 165 245-266 | 1993 | San Francisco mine, Villa Tu nari, Bolivia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.63 Å | (100) |
6.63 Å | (90) |
4.05 Å | (90) |
3.05 Å | (90) |
3.61 Å | (80) |
5.13 Å | (70) |
4.71 Å | (70) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
19 : Granitic intrusive rocks | |
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
26 : Hadean detrital minerals | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Geological Setting:
Saltdome caprock
Type Occurrence of Povondraite
General Appearance of Type Material:
Crystals (to several mm), intergrown or forming subparallel aggregates. Not easily recognized as tourmaline. Crystals are not elongated along the c axis, but are more equant in habit.
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Canada, M35899.
National Museum of Natural History, Washington, D.C., USA, 144478.
National Museum of Natural History, Washington, D.C., USA, 144478.
Geological Setting of Type Material:
Schist, possibly limited to younger fissures. Rare.
Associated Minerals at Type Locality:
Synonyms of Povondraite
Other Language Names for Povondraite
Relationship of Povondraite to other Species
Member of:
Other Members of this group:
Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Alumino-oxy-rossmanite | ◻Al3Al6(Si5AlO18)(BO3)3(OH)3O | Trig. 3m : R3m |
Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Celleriite | ◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Chromium-dravite | NaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Chromo-alumino-povondraite | NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Darrellhenryite | Na(Al2Li)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Dutrowite | Na(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Ferro-bosiite | NaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Feruvite | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Fluor-buergerite | NaFe3+3Al6(Si6O18)(BO3)3O3F | Trig. 3m : R3m |
Fluor-dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Foitite | ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Lucchesiite | CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Magnesio-dutrowite | Na(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Magnesio-foitite | ◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Magnesio-lucchesiite | CaMg3Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Maruyamaite | K(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Olenite | NaAl3Al6(Si6O18)(BO3)3O3(OH) | Trig. 3m : R3m |
Oxy-chromium-dravite | NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-dravite | Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-foitite | ◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m (3 2/m) : R3m |
Oxy-rossmanite | ◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O | |
Oxy-schorl | Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-uvite | CaMg3Al6(Si6O18)(BO3)3(OH)3O | |
Oxy-vanadium-dravite | NaV3(V4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Princivalleite | Na(Mn2Al)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Rossmanite | ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Tsilaisite | NaMn2+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 (F analogue of feruvite) | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F | |
Unnamed (Pb-analogue of Fluor-liddicoatite) | Pb(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | |
Uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Vanadio-oxy-chromium-dravite | NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Povondraite associated with Microcline | K(AlSi3O8) |
2 photos of Povondraite associated with Magnesite | MgCO3 |
2 photos of Povondraite associated with Clinoenstatite | MgSiO3 |
2 photos of Povondraite associated with Hydroniumjarosite | (H3O)Fe3+3(SO4)2(OH)6 |
2 photos of Povondraite associated with Quartz | SiO2 |
1 photo of Povondraite associated with Azurite | Cu3(CO3)2(OH)2 |
Related Minerals - Strunz-mindat Grouping
9.CK. | Fluor-schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3F |
9.CK. | Darrellhenryite | Na(Al2Li)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) |
9.CK. | Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK. | Dutrowite | Na(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Celleriite | ◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK. | Princivalleite | Na(Mn2Al)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Alumino-oxy-rossmanite | ◻Al3Al6(Si5AlO18)(BO3)3(OH)3O |
9.CK. | Ferro-bosiite | NaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3O |
9.CK. | Magnesio-dutrowite | Na(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-buergerite | NaFe3+3Al6(Si6O18)(BO3)3O3F |
9.CK.05 | Chromium-dravite | NaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Feruvite | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Foitite | ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Olenite | NaAl3Al6(Si6O18)(BO3)3O3(OH) |
9.CK.05 | Schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Magnesio-foitite | ◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Rossmanite | ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Oxy-vanadium-dravite | NaV3(V4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-dravite | Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-rossmanite | ◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Luinaite-(OH) | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Chromo-alumino-povondraite | NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Oxy-schorl | Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Unnamed (F analogue of feruvite) | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F |
9.CK.05 | UM2000-64-SiO:BFeHKMg | (K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O |
9.CK.05 | Oxy-chromium-dravite | NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Vanadio-oxy-chromium-dravite | NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Maruyamaite | K(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Lucchesiite | CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-foitite | ◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-uvite | CaMg3Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Magnesio-lucchesiite | CaMg3Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) |
9.CK.10 | Abenakiite-(Ce) | Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)O |
9.CK.15 | Scawtite | Ca7(Si3O9)2CO3 · 2H2O |
9.CK.20 | Steenstrupine-(Ce) | Na14Mn2+2Fe3+2Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2O |
9.CK.20 | Thorosteenstrupine | (Ca,Th,Mn)3Si4O11F · 6H2O |
Other Information
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 Povondraite
mindat.org URL:
https://www.mindat.org/min-3274.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Povondraite
Reference List:
Hawthorne, Frank C., Henrys, Darrell J. (1999) Classification of the minerals of the tourmaline group. European Journal of Mineralogy, 11 (2) 201-216 doi:10.1127/ejm/11/2/0201
Henry, D. J., Novak, M., Hawthorne, F. C., Ertl, A., Dutrow, B. L., Uher, P., Pezzotta, F. (2011) Nomenclature of the tourmaline-supergroup minerals. American Mineralogist, 96 (5) 895-913 doi:10.2138/am.2011.3636
Localities for Povondraite
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.
Australia | |
| Jones et al. (1981) |
| Fetherston et al. (2012) |
| T Kapitany (pers comm) |
Austria | |
| B. Moser (2002) |
Bolivia | |
| Mineralogical Record: 32: 461 +1 other reference |
| - (erroneously attributed to San Francisco mine in the type description) |
- (erroneously attributed to this mine in the type description) | |
Brazil | |
| erroneously reported [MinRec 33:209] |
Mali | |
| Masurel et al. (2017) |
Russia | |
| Mineralogy of the Peschanka porphyry copper deposit et al. (Trans. Inst. Min. Metall. B) |
| Nikolaev et al. (2013) |
| Baksheev et al. (2015) |
Baksheev et al. (2015) | |
Baksheev et al. (2015) | |
Slovakia | |
| Bačík et al. (2008) |
| Bačík et al. (2008) |
USA | |
| Robert Jemkins +1 other reference |
| Ex collection Dipl. Min. Ulrich Vetter |
Quick NavTopAbout PovondraiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Alto Chapare mining district, Chapare Province, Cochabamba, Bolivia