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Britvinite

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Formula:
[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
System:
Triclinic
Colour:
pale yellow to colorless
Lustre:
Adamantine
Hardness:
3
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).


Classification of Britvinite

Approved
Approval Year:
2006
9.EG.70

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

Physical Properties of Britvinite

Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
pale yellow to colorless
Streak:
white
Hardness (Mohs):
3
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 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
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Britvinite

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

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

Relationship of Britvinite to other Species

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2O
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26
9.EG.15DmisteinbergiteCa(Al2Si2O8)
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2O
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2O
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
9.EG.40Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
9.EG.50JagoitePb18Fe43+[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6
9.EG.60HyttsjöitePb18Ba2Ca5Mn22+Fe23+Si30O90Cl · 6H2O
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2O
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O

Other Names for Britvinite

Name in Other Languages:

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.

References for Britvinite

Reference List:
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 Britvinite

mindat.org URL:
https://www.mindat.org/min-30905.html
Please feel free to link to this page.

Localities for Britvinite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
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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