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Britvinite
A valid IMA mineral species
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About Britvinite
Sergei N. Britvin
Formula:
[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
Colour:
pale yellow to colorless
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
5.51 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of Sergei Nikolaevich Britvin (ĐĄĐ”ŃгДĐč ĐĐžĐșĐŸĐ»Đ°Đ”ĐČĐžŃ ĐŃĐžŃĐČĐžĐœ) (b. 1965), a Russian mineralogist at St. Petersburg State University with a wide range of scientific interests, including the mineralogy of skarn deposits.
Closely related to molybdophyllite.
Originally named "Molybdophyllite-18 Ă " by Charalampides (1994).
Originally named "Molybdophyllite-18 Ă " by Charalampides (1994).
Unique Identifiers
Mindat ID:
30905
Long-form identifier:
mindat:1:1:30905:9
IMA Classification of Britvinite
Approved
IMA Formula:
Pb2+14Mg9Si10O28(BO3)4(CO3)2F2(OH)12
Approval year:
2006
First published:
2007
Classification of Britvinite
9.EG.70
9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Bv | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Britvinite
Adamantine
Transparency:
Transparent
Colour:
Pale yellow to colorless
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Flexible
Cleavage:
Distinct/Good
parallel to {001}.
parallel to {001}.
Comment:
Flexible in thin lamella, thick one is brittle
Density:
5.51 g/cm3 (Calculated)
Optical Data of Britvinite
Type:
Biaxial (-)
RI values:
nα = 1.896(2) nβ = 1.903(2) nγ = 1.903(2)
2V:
Measured: 20° (10)
Max. Birefringence:
δ = 0.007
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Chemistry of Britvinite
Mindat Formula:
[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
Element Weights:
Crystallography of Britvinite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 9.3409(8) Å, b = 9.3579(7) Å, c = 18.8333(14) Å
α = 80.365(6)°, β = 75.816(6)°, γ = 59.870(5)°
α = 80.365(6)°, β = 75.816(6)°, γ = 59.870(5)°
Ratio:
a:b:c = 0.998 : 1 : 2.013
Unit Cell V:
1378.7 Ă
Âł
Z:
2
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) |
|---|---|---|---|---|---|---|---|
| 0012396 | Britvinite | Yakubovich O V, Massa W, Chukanov N V (2008) Crystal structure of britvinite [Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]: A new layered silicate with an original type of silicon-oxygen networks Crystallography Reports 53 206-215 | 2008 | Varmland, Sweden | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 18.1 Ă | (100) |
| 3.39 Ă | (30) |
| 3.02 Ă | (90) |
| 2.698 Ă | (70) |
| 2.275 Ă | (30) |
| 1.867 Ă | (30) |
| 1.766 Ă | (40) |
| 1.519 Ă | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Britvinite
General Appearance of Type Material:
plates
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow. The registration number is 3458/1.
Associated Minerals at Type Locality:
Synonyms of Britvinite
Other Language Names for Britvinite
Dutch:Britviniet
German:Britvinit
Common Associates
Associations Based on Photo Data:
| 11 photos of Britvinite associated with Hausmannite | Mn2+Mn3+2O4 |
| 11 photos of Britvinite associated with Calcite | CaCO3 |
| 9 photos of Britvinite associated with Barytocalcite | BaCa(CO3)2 |
Related Minerals - Strunz-mindat Grouping
| 9.EG.05 | Cymrite | BaAl2Si2(O,OH)8 · H2O |
| 9.EG.10 | Naujakasite | (Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26 |
| 9.EG.10 | Manganonaujakasite | Na6(Mn2+,Fe2+)Al4Si8O26 |
| 9.EG.15 | Dmisteinbergite | Ca(Al2Si2O8) |
| 9.EG.20 | Kampfite | Ba12(Si11Al5)O31(CO3)8Cl5 |
| 9.EG.25 | Vertumnite | Ca4Al4Si4O6(OH)24 · 3H2O |
| 9.EG.30 | Eggletonite | (Na,K,Ca)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11) |
| 9.EG.30 | Ganophyllite | (K,Na)xMn2+6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11) |
| 9.EG.30 | Tamaite | (Ca,K,Na)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11) |
| 9.EG.35 | Zussmanite | K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14 |
| 9.EG.35 | Coombsite | KMn2+13(Si,Al)18O42(OH)14 |
| 9.EG.40 | 'Chalcodite' | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
| 9.EG.40 | Parsettensite | (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O |
| 9.EG.40 | Lennilenapeite | K4Mn2+48[Si64Al8]O164(OH)52 · nH2O |
| 9.EG.40 | Stilpnomelane | K4Fe2+48[Si64Al8]O164(OH)52 · nH2O |
| 9.EG.45 | Latiumite | (Ca,K)4(Si,Al)5O11(SO4,CO3) |
| 9.EG.45 | Levantite | KCa3Al2(SiO4)(Si2O7)(PO4) |
| 9.EG.45 | Tuscanite | KCa6(Si,Al)10O22(SO4,CO3)2(OH) · H2O |
| 9.EG.50 | Jagoite | Pb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6 |
| 9.EG.50 | Friisite | Pb8Al3Si8O27Cl3 |
| 9.EG.55 | Wickenburgite | CaPb3Al2Si10O24(OH)6 |
| 9.EG.60 | Hyttsjöite | Pb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2O |
| 9.EG.65 | Armbrusterite | K5Na7Mn15[(Si9O22)4](OH)10 · 4H2O |
| 9.EG.70 | Roymillerite | Pb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5 |
| 9.EG.75 | Kayupovaite | Na2Mn10[(Si14Al2)O38(OH)8] · 7H2O |
| 9.EG.75 | 'UM1989-30-SiO:AlBaCaFeHKMgMn' | (Ba,Ca)(Mn,Fe,Mg)22(Si,Al)32O76(OH)16 · 12H2O |
| 9.EG.75 | Bannisterite | CaMn2+10(Si14Al2)O38(OH)8 · nH2O |
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 Britvinite
mindat.org URL:
https://www.mindat.org/min-30905.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Britvinite
Reference List:
Charalampides, G. (1994): Mineralogical and crystal-chemical data of the lead silicate species ganomalite, margarosanite, and molybdophyllite from LĂ„ngban, south-central Sweden and their synthetic equivalents. Oryktos Ploutos, 91, 33-46.(as "Molybdophyllite-18 Ă
")
Chukanov, N. V., Yakubovich, O. V., Pekov, I. V., Belakovsky, D. I., Massa, W. (2008) Britvinite, Pb15Mg9(Si10O28)(BO3)4(CO3)2(OH)12O2, a new mineral species from LĂ„ngban, Sweden. Geology of Ore Deposits, 50 (8) 713-719 doi:10.1134/s1075701508080072
Localities for Britvinite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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).
All localities listed without proper references should be considered as questionable.
Namibia | |
| Raman confirmed at University of ... |
Sweden (TL) | |
| Chukanov N. V.; Yakubovich et al. (2007) +1 other reference |
Quick NavTopAbout BritviniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden