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Britvinite

Collectors Summary

Color farblos bis blassgelb
Streak color weiß
Lustre Diamantglanz
Hardness (Mohs) 3
Cleavages vollkommen (001)
Fracture glimmerartig
Crystal System triklin, P1

Chemism

Chemical formula

Pb7+xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7

Chemical composition

Aluminium, Arsen, Blei, Magnesium, Silicium, Bor, Kohlenstoff, Sauerstoff, Wasserstoff

Analysis wt%

SiO2 : 12.77, CO2 : 2.10, B2O3 : 2.67, Al2O3 : 0.41, MgO : 7.95, PbO : 71.92, H2O : 2.20 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2007)

Strunz 9th edition incl. updates

9.EG.70

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
G: Doppelnetze mit sechsfach-Ringen
70:

Lapis Classification

VIII/H.24-002

VIII: SILIKATE
H: Schichtsilikate
24: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen;

Classification by Hölzel

9.ES.360

9: SILICATES
E: Phyllosilicates
S: Phyllosilicates with tetrahedral Doublelayers

IMA status

anerkannt 10/2006

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos bis blassgelb

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Diamantglanz

max. Birefringence

0.007

Birefringence chart\! Britvinite title=Birefringence chart Britvinite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.896

RI value β

1.903

RI value γ / ε

1.903

Ri mean

1.901

2V angle

Biaxial (-) 20°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

9.341

Cell parameters b (Å)

9.360

Cell parameters c (Å)

18.333

Cell parameters a/b or c/a

0.998

Cell parameters c/b

1.959

Cell parameters α

80.37

Cell parameters β

75.82

Cell parameters γ

59.87

Z

1

Volume (ų)

1342.2

X-Ray Powder Diffraction

18.1 (100), 3.39(30), 3.02(90), 2.698(70), 2.275(30), 1.867(30), 1.766(40), 1.519(40)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.42

Cleavages

vollkommen (001)

Fracture

glimmerartig

Tenacity

schneidbar

Preface

Associations

Barytocalcit, Brucit, Cerussit

Name from

Sergey N. Britvin (Spezialist für Karbonatit-und Skarn-Lagerstätten und Meteoriten)

Author (Name, Year)

Chukanov

References

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.

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)
Mineralien Welt 04/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

Other languages

German

Britvinit

Spanish

Britvinita

English

Britvinite

Russian

Бритвинит

Alternative Name

Molybdophyllite-18 Å

CNMNC (IMA)-Number

IMA 2006-031

CNMNC symbol

Symbol

Bv

Locations with GPS information

IDs

GUSID (Global unique identifier short form) nLX9TOXpkkmLlm3ekAdxnQ
GUID (Global unique identifier) 4CFDB59C-E9E5-4992-8B96-6DDE9007719D
Database ID 4381