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Boromuscovite

Pictures (2 Images total)

Lepidolith, Boromuskovit
Views (File:
1360541149
): 1829
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
): 784
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

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/San Diego Co./Ramona District/Little Three Mine

IMA group assignments

 
Mica group
 
 
 

 
 
True micas
 
 
 

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

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

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

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

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

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

 
 
 
Eastonite
KMg2Al[(OH)2|Al2Si2O10]
monoklin
C2

 
 
 
Ephesite
NaLiAl2(Al2Si2)O10(OH)2
monoklin
Cc

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

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

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

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

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

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

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

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

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

 
 
 
Norrishite
KLiMn3+2Si4O12
monoklin
C2/m

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

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

 
 
 
Polylithionite
KLi2AlSi4O10(F,OH)2
monoklin
C2/m

 
 
 
Preiswerkite
NaMg2Al3Si2O10(OH)2
monoklin
C2/m

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

 
 
 
Shirozulite
K(Mn2+,Mg)3[(OH)2|AlSi3O10]
 
 

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

 
 
 
Sokolovaite
CsLi2AlSi4O10F2
monoklin
 

 
 
 
Tainiolite
KLiMg2Si4O10F2
monoklin
C/2m

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

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

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

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

 
 
 
Yangzhumingite
KMg2.5Si4O10F2
monoklin
C2/m

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Actuality: 29. Sep 2024 - 17:31:56

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