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Chromphyllite

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Chromphyllit
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1584641382
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Chromphyllit
grüne Kristalle mit Spaltflächen von Chromphyllit, Sljudjanka, Baikalsee, Irkutsk, Russland; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Baikalsee/Sljudjanka (Sludyanka; Slyudyanka)
Mineral: Chromphyllite
Image: 1584641382
License: Usage for Mineralienatlas project only
Chromphyllit

grüne Kristalle mit Spaltflächen von Chromphyllit, Sljudjanka, Baikalsee, Irkutsk, Russland; BB < 1 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-19
Locality: Sljudjanka (Sludyanka; Slyudyanka) / Baikalsee / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland

Collectors Summary

Color smaragdgrün
Streak color weißlich grün
Hardness (Mohs) 3.5
Cleavages vollkommen {001}
Solubility - HCl, HNO3
Crystal System monoklin, C2/c

Chemism

Chemical formula

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

Chemical composition

Aluminium, Chrom, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 436.826014425 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

K(Cr0.75Al0.25)2[((OH)0.75F0.25)2AlSi3O10]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.35

1.5

7.32

1.0079470

1.5119205

Oxygen

O

42.12

11.5

56.10

15.9994300

183.9934450

Fluorine

F

2.17

0.5

2.44

18.9984033

9.4992016

Aluminium

Al

9.27

1.5

7.32

26.9815382

40.4723073

Silicon

Si

19.29

3

14.63

28.0855300

84.2565900

Potassium

K

8.95

1

4.88

39.0983100

39.0983100

Chromium

Cr

17.85

1.5

7.32

51.9961600

77.9942400

Analysis wt%

Ø SiO2 : 40.24, Al2O3 : 14.11, Cr2O3 : 23.99, V2O3 : 2.08, MgO : 1.60, BaO : 4.83, K2O : 8.54, H2O : 3.32, F : 1.28 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 97)

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.10-080

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.242

9: SILICATES
E: Phyllosilicates
C: Micas-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Mica group  ⇒ True micas

Optical Properties

Color

smaragdgrün

Streak color

weißlich grün

Diaphaneity (Transparency)

transparent

max. Birefringence

0.054

Birefringence chart\! Chromphyllite title=Birefringence chart Chromphyllite

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

1.619

RI value β

1.669

RI value γ / ε

1.673

Ri mean

1.654

2V angle

Biaxial (-) 31°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

5.32

Cell parameters b (Å)

9.07

Cell parameters c (Å)

20.50

Cell parameters a/b or c/a

0.587

Cell parameters c/b

2.260

Cell parameters α

90°

Cell parameters β

95.60

Cell parameters γ

90°

Z

4

Volumne (ų)

984.453

X-Ray Powder Diffraction

9.94(60),
4.52(80),
2.86(50),
2.60(100),
2.40(60),
2.15(60),
1.648(50),
1.519(100)

XRD chart Chromphyllite

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)

3.5

VHN (Hardness Vickers)

129 (25g)

Density (g/cm³)

2.88

2.947 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Tenacity

schneidbar

Instability

- HCl, HNO3

Preface

Author (Name, Year)

Reznitskiy & Sklyarov & Ushchapovskaya & Nartova & Evsyunin & Kashaev

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 126 (1997) (2), 110

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: 31. Jan 2023 - 06:11:39

Other languages

German

Chromphyllit

French

Chromphyllite

English

Chromphyllite

Spanish

Cromfilita

Russian

Хромфиллит

Alternative Name

Spanish

Chromphyllita

CNMNC (IMA)-Number

IMA 1995-052

CNMNC symbol

Symbol

Crp

Locations with GPS information