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Boromuscovite

Pictures (2 Images total)

Lepidolith, Boromuskovit
Views (File:
1360541149
): 1770
Lepidolith, Boromuskovit
blättrige Lepidolith-Kristalle, Boromuskovit als weiße Überzüge, Größe: 10 x 8 x 7 cm, Fundort: Little Three Mine, Ramona District, San Diego Co., Kalifornien, USA
Copyright: Rob Lavinsky; Contribution: thdun5
Location: USA/Kalifornien (California)/San Diego Co./Ramona District/Little Three Mine
Mineral: Boromuscovite, Lepidolite
Image: 1360541149
License: Usage for Mineralienatlas project only
Lepidolith, Boromuskovit

blättrige Lepidolith-Kristalle, Boromuskovit als weiße Überzüge, Größe: 10 x 8 x 7 cm, Fundort: Little Three Mine, Ramona District, San Diego Co., Kalifornien, USA

Copyright: Rob Lavinsky
Contribution: thdun5 2013-02-11
Locality: Little Three Mine / Ramona District / San Diego Co. / Kalifornien (California) / USA
Boromuskovit
Views (File:
1360541196
): 769
Boromuskovit
Bildbreite: 2 mm, Fundort: Little Three Mine, Ramona District, San Diego Co., Kalifornien, USA
Copyright: Luigi Chiappino; Contribution: thdun5
Location: USA/Kalifornien (California)/San Diego Co./Ramona District/Little Three Mine
Mineral: Boromuscovite
Image: 1360541196
License: Usage for Mineralienatlas project only
Boromuskovit

Bildbreite: 2 mm, Fundort: Little Three Mine, Ramona District, San Diego Co., Kalifornien, USA

Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-11
Locality: Little Three Mine / Ramona District / San Diego Co. / Kalifornien (California) / USA

Collectors Summary

Color weiß, beige weiß
Streak color weiß
Hardness (Mohs) 2.75
Cleavages vollkommen {001} und undeutlich teilbar nach {010}
Fracture dürftig bis halbmuschelig
Crystal System monoklin, C2/m

Chemism

Chemical formula

KAl2(Si3B)O10(OH,F)2

Chemical composition

Aluminium, Silicium, Bor, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 383.134243525 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

KAl2(Si3B)O10((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.39

1.5

7.32

1.0079470

1.5119205

Boron

B

2.82

1

4.88

10.8117000

10.8117000

Oxygen

O

48.02

11.5

56.10

15.9994300

183.9934450

Fluorine

F

2.48

0.5

2.44

18.9984033

9.4992016

Aluminium

Al

14.08

2

9.76

26.9815382

53.9630764

Silicon

Si

21.99

3

14.63

28.0855300

84.2565900

Potassium

K

10.20

1

4.88

39.0983100

39.0983100

Analysis wt%

SiO2 : 48.10, Al2O3 : 28.10, B2O3 : 7.00, K2O : 11.00, Rb2O : 0.52, F : 0.76, H2O : 4.77 (Ref: American Mineralogist 91)

Strunz 9th edition incl. updates

9.EC.15

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
15:Muskovit-Gruppe

Lapis Classification

VIII/H.10-060

VIII: SILIKATE
H: Schichtsilikate
10: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Seladonit/Muskovit-Reihe (Phengite)

Classification by Hölzel

9.EC.245

9: SILICATES
E: Phyllosilicates
C: Micas-Group

IMA Classification

IMA Classification

Mica group  ⇒ True micas

Optical Properties

Color

weiß, beige weiß

Streak color

weiß

Diaphaneity (Transparency)

opak

max. Birefringence

0.036

Birefringence chart\! Boromuscovite title=Birefringence chart Boromuscovite

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

1.557

RI value β

1.587

RI value γ / ε

1.593

Ri mean

1.579

2V angle

Biaxial (-) 44°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

5.075 -

Cell parameters b (Å)

8.794 -

Cell parameters c (Å)

19.815 -

Cell parameters a/b or c/a

0.577 -

Cell parameters c/b

2.253 -

Cell parameters α

90°

Cell parameters β

95.58

Cell parameters γ

90°

Z

4

Volume (ų)

880.144

X-Ray Powder Diffraction

9.9(60),
4.24(40),
3.569(100),
3.008(80),
2.533(30),
2.505(80),
2.489(40),
2.195(40)

XRD chart Boromuscovite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.75

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.81

2.891 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001} und undeutlich teilbar nach {010}

Fracture

dürftig bis halbmuschelig

IMA group assignments

 
 
 
 

 
 
 
 
 

 
 
 
K(Mg,Fe2+)Al[(OH)2|Si4O10]
monoklin
 

 
 
 
KFe2+3(Si3Al)O10(OH,F)2
monoklin
C2/m

 
 
 
NaMg3(AlSi3)O10(OH)2
monoklin
C2/m

 
 
 
KAl2(Si3B)O10(OH,F)2
monoklin
C2/m

 
 
 
K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2
monoklin
C2

 
 
 
K(Cr,Al)2[(OH,F)2|AlSi3O10]
monoklin
C2/c

 
 
 
KMg2Al[(OH)2|Al2Si2O10]
monoklin
C2

 
 
 
NaLiAl2(Al2Si2)O10(OH)2
monoklin
Cc

 
 
 
K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]
monoklin
C2/m

 
 
 
KFe32+[(F,OH)2|AlSi3O10]
monoklin
C2/m

 
 
 
(Ba,Na,K)(Al,Mg)2[(OH,F)2|(Al,Si)Si2O10]
monoklin
C2/c

 
 
 
K(Zn,Mn)3Si3AlO10(OH)2
monoklin
C2/m

 
 
 
K(Li,Al,Mn2+)3(Si,Al)4O10(F,OH)2
monoklin
C2

 
 
 
KMn0.52+Fe1.52+Mg0.5[F2|Si4O10]
monoklin
C2/m

 
 
 
KAl2(Si3Al)O10(OH,F)2
monoklin
C2/c

 
 
 
CsAl2(Si,Al)4O10(OH,F)2
monoklin
C2/c

 
 
 
KLiMn3+2Si4O12
monoklin
C2/m

 
 
 
NaAl2(Si3Al)O10(OH)2
monoklin
C2/c

 
 
 
KMg3(Si3Al)O10(F,OH)2
monoklin
C2/m

 
 
 
KLi2AlSi4O10(F,OH)2
monoklin
C2/m

 
 
 
NaMg2Al3Si2O10(OH)2
monoklin
C2/m

 
 
 
K(V,Al,Mg)2AlSi3O10(OH)2
monoklin
C2/m

 
 
 
K(Mn2+,Mg)3[(OH)2|AlSi3O10]
 
 

 
 
 
KFe22+Al(Al2Si2)O10(F,OH)2
monoklin
C2/m

 
 
 
CsLi2AlSi4O10F2
monoklin
 

 
 
 
KLiMg2Si4O10F2
monoklin
C/2m

 
 
 
KFe2+3(Si3Fe3+)O10(OH)2
monoklin
C2/m

 
 
 
KMg3[(F,OH)2|(Al,Fe3+)Si3O10]
monoklin
C2/m

 
 
 
(NH4,K)Al2(Si3Al)O10(OH)2
monoklin
C2/m

 
 
 
KLi1.5Al1.5[F2|AlSi3O10]
monoklin
C2/m

 
 
 
KMg2.5Si4O10F2
monoklin
C2/m

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Actuality: 23. Mar 2024 - 13:17:49

Other languages

English

Boromuscovite

German

Boromuskovit

Russian

Боромусковит

Alternative Name

German

Boromuscovit

Spanish

Boromuscovita

CNMNC (IMA)-Number

IMA 1989-027

CNMNC symbol

Symbol

Bms

Locations with GPS information

IDs

GUSID (Global unique identifier short form) dq8D8W9mGUy4sIHukD8eMw
GUID (Global unique identifier) F103AF76-666F-4C19-B8B0-81EE903F1E33
Database ID 459