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Boromuscovite

Pictures (2 Images total)

Lepidolith, Boromuskovit
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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
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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

Volumne (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

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Sericite' (Var.v. Muscovite)

9.EC.15

Ganterite

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

monoklin : 2/m : C2/c

9.EC.15

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.15

Tobelite

(NH4,K)Al2(Si3Al)O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

'Glauconite'

(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

Montdorite

KMn0.52+Fe1.52+Mg0.5[F2|Si4O10]

monoklin : 2/m : C2/m

9.EC.15

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.15

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

9.EC.15

Celadonite

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

monoklin : 2 : C2

9.EC.15

Chernykhite

BaV2(Si2Al2)O10(OH)2

monoklin : 2/m : C2/c

9.EC.15

Roscoelite

K(V,Al,Mg)2AlSi3O10(OH)2

monoklin : 2/m : C2/m

9.EC.15

Tainiolite

KLiMg2Si4O10F2

monoklin : 2/m : C/2m

9.EC.15

Voloshinite

Rb(LiAl1.50.5)(Al0.5Si3.5)O10F2

monoklin : C2/c

9.EC.15

Cossaite

(Mg0.5,◻)Al6(SO4)6(HSO4)F6·36H2O

trigonal : 3 : R3

9.EC.15

'Muscovite-1M' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.15

'Muscovite-2A' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

triklin : 1 : C1

9.EC.15

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.15

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

9.EC.15

'Muscovite-3T' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

trigonal : 32 : P3112

9.EC.15

'Muscovite-2M2' (Pol.v. Muscovite)

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m

9.EC.15

Chromceladonite

KMgCr[(OH)2|Si4O10]

monoklin : 2 : C2

9.EC.15

Ferroceladonite

K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

9.EC.15

Aluminoceladonite

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

9.EC.15

Manganiceladonite

KMgMn3+Si4O10(OH)2

monoklin : 2/m, 2 : C2, C2/m

9.EC.15

'Zweiaxiger glimmer'

KAl2(Si,Al)4O10(OH)2

9.EC.15

Ferroaluminoceladonite

K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

9.EC.15

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Aluminoceladonite

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

VIII/H.10-010

Ferroaluminoceladonite

K(Fe2+,Mg)(Al,Fe3+)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.10-020

Celadonite

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

monoklin : 2 : C2

VIII/H.10-030

Chromceladonite

KMgCr[(OH)2|Si4O10]

monoklin : 2 : C2

VIII/H.10-035

Ferroceladonite

K(Fe2+,Mg)(Fe3+,Al)[(OH)2|Si4O10]

monoklin : 2/m : C2/m

VIII/H.10-040

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

VIII/H.10-050

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

VIII/H.10-060

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

VIII/H.10-070

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

VIII/H.10-080

Roscoelite

K(V,Al,Mg)2AlSi3O10(OH)2

monoklin : 2/m : C2/m

VIII/H.10-090

Ganterite

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

monoklin : 2/m : C2/c

VIII/H.10-095

Tobelite

(NH4,K)Al2(Si3Al)O10(OH)2

monoklin : 2/m : C2/m

VIII/H.10-100

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

VIII/H.10-110

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Paragonite

NaAl2(Si3Al)O10(OH)2

monoklin : 2/m : C2/c

9.EC.200

Luanshiweiite-2M1

KLiAl1.5(Si3.5Al0.5)O10(OH)2

monoklin : 2/m : C2/c

9.EC.205

Muscovite

KAl2(Si3Al)O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.240

'Fuchsite' (Var.v. Muscovite)

K(Al,Cr)3Si3O10(OH)2

9.EC.241

Chromphyllite

K(Cr,Al)2[(OH,F)2|AlSi3O10]

monoklin : 2/m : C2/c

9.EC.242

'Boromuscovite'

KAl2(Si3B)O10(OH,F)2

monoklin : 2/m : C2/m

9.EC.245

Nanpingite

CsAl2(Si,Al)4O10(OH,F)2

monoklin : 2/m : C2/c

9.EC.250

Voloshinite

Rb(LiAl1.50.5)(Al0.5Si3.5)O10F2

monoklin : C2/c

9.EC.255

Chernykhite

BaV2(Si2Al2)O10(OH)2

monoklin : 2/m : C2/c

9.EC.260

Ganterite

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

monoklin : 2/m : C2/c

9.EC.270

Other languages

English

Boromuscovite

German

Boromuskovit

Russian

Боромусковит

Alternative Name

German

Boromuscovit

Spanish

Boromuscovita

IMA Number

IMA 1989-027

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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Russian pages

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German pages

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