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Britvinite

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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 (b. 1965), a Russian mineralogist.
Closely related to molybdophyllite.

Originally named "Molybdophyllite-18 Å" by Charalampides (1994).


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Classification of BritviniteHide

Approved
Approval Year:
2006
9.EG.70

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings

Physical Properties of BritviniteHide

Adamantine
Transparency:
Transparent
Colour:
pale yellow to colorless
Streak:
white
Hardness:
Tenacity:
Flexible
Cleavage:
Distinct/Good
parallel to {001}.
Comment:
Flexible in thin lamella, thick one is brittle
Density:
5.51 g/cm3 (Calculated)

Optical Data of BritviniteHide

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

Chemical Properties of BritviniteHide

Formula:
[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
IMA Formula:
Pb14Mg9Si10O28(BO3)4(CO3)2F2(OH)12

Crystallography of BritviniteHide

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)°
Ratio:
a:b:c = 0.998 : 1 : 2.013
Unit Cell V:
1378.7 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
18.1 (100)
3.39 (30)
3.02 (90)
2.698 (70)
2.275 (30)
1.867 (30)
1.766 (40)
1.519 (40)

Type Occurrence of BritviniteHide

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 BritviniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hausmannite2 photos of Britvinite associated with Hausmannite on mindat.org.
Calcite2 photos of Britvinite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2OMon.
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon. 2/m : B2/m
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26Mon.
9.EG.15DmisteinbergiteCa(Al2Si2O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2OTrig.
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2OMon.
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14Trig.
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2OTric.
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
9.EG.50JagoitePb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6Hex.
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig.
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

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 BritviniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Charalampides, G. and Lindqvist, B. (1988) Ganomalite, margarosanite and molybdophyllite from Långban, south-central Sweden, and synthetic equivalents. Meddelanden från Stockholms Universitets Geologiska Institution, 273, IV/1-IV/24.
Charalampides, G. (1994) Mineralogical and crystal-chemical data of the lead silicate species ganomalite, margarosanite, and molybdophyllite from Långban, south-central Sweden and their synthetic equivalents. Oryktos Ploutos, 91, 33-46. [as "Molybdophyllite-18 Å"]
Chukanov, N.V., Yakubovich, O.V., Pekov, I.V., Belakovsky, D.I., Massa, W. (2007): Britvinite, Pb15Mg9(Si10O28)(BO3)4(CO3)2(OH)12O2 - a new mineral from Langban, Sweden. Proceedings of the Russian Mineralogical Society (Zapiski RMO), 136(6), 18-25.
Chukanov, N.V., Yakubovich, O.V., Pekov, I.V., Belakovsky, D.I., Massa, W.: Britvinite, Pb15Mg9(Si10O28)(BO3)4(CO3)2(OH)12O2, a new mineral species from Långban, Sweden. Geology of Ore Deposits, 50, 713-719 (2008) [English translation]
O. V. Yakubovich, W. Massa and N. V. Chukanov (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: Kristallografiya, 53(2), 233–242. [English translation: Crystallography Reports 53, 206-215 (2008)]
U. Kolitsch, S. Merlino and D. Holtstam (2012): Molybdophyllite: crystal chemistry, crystal structure, OD character and modular relationships with britvinite. Mineral. Mag. 76, 493-516.

Internet Links for BritviniteHide

Localities for BritviniteHide

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.
Namibia
 
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Raman confirmed at University of Arizona.
Sweden (TL)
 
  • Värmland
    • Filipstad
Proceedings of the Russian Mineralogical Society (Zapiski RMO), 136(6), 18-25.
Mineral and/or Locality  
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