Mineralogy Database

Chromphyllite Mineral Data

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General Chromphyllite Information

Help on Chemical  Formula: Chemical Formula: (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2
Help on Composition: Composition: Molecular Weight = 415.64 gm
   Potassium   7.06 %  K     8.50 % K2O
   Barium      8.26 %  Ba    9.22 % BaO
   Aluminum    8.11 %  Al   15.33 % Al2O3
   Chromium    9.38 %  Cr   13.71 % Cr2O3
   Silicon    20.27 %  Si   43.37 % SiO2
   Hydrogen    0.36 %  H     3.25 % H2O
   Oxygen     44.27 %  O
   Fluorine    2.29 %  F     2.29 % F
                -   %   F    -0.96 % -O=F2    
             ______        ______ 
             100.00 %       94.71 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75Ba0.25Cr0.75Al1.25Si3O10(OH)1.5F0.5
Help on Environment: Environment: Cr-enriched layers in quartz-diopside rocks.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: Slyudyanka complex, Southern Lake Baikal region, Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name alludes to the composition and micaceous cleavage.
Help on Synonym: Synonym: IMA1995-052
 

Chromphyllite Image

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  Chromphyllite

Comments: Small grains of blue-green chromphyllite.
Location: Slyudyanka, Southern Lake Baikal, Russia. Scale: Peg Size 1 cm.
© Sergey Vasiliev / Systematic Mineralogy

Chromphyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5865:1:2.2601
Help on Cell Dimensions: Cell Dimensions: a = 5.32, b = 9.07, c = 20.5, Z = 4; beta = 95.6° V = 984.45 Den(Calc)= 2.80
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.519(1), 2.6(1), 4.52(0.8),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 1 0) ( 0 0 1)

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Physical Properties of Chromphyllite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Emerald green.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: whitish green
 

Optical Properties of Chromphyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.122 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.154 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2335,KPDmeas= 0.227,KC= 0.2023
Ncalc = 1.57 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.619, b=1.669, g=1.673, bire=0.0540, 2V(Calc)=30, 2V(Meas)=31. Dispersion r > v distinct.
 

Calculated Properties of Chromphyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.81 gm/cc
note: Specific Gravity of Chromphyllite =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEChromphyllite = 37.86 barns/electron
U=PEChromphyllite x relectron= 106.25 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 99.20 (Gamma Ray American Petroleum Institute Units)
Concentration of Chromphyllite per GRapi unit = 1.01 (%)

Estimated Radioactivity from Chromphyllite - barely detectable

 

Chromphyllite Classification

Help on  Dana Class: Dana Class: 71.02.02a.11 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02a)Mica Group (Muscovite subgroup)
 
71.02.02a.01 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m
 
71.02.02a.02 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono
 
71.02.02a.03 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m
 
71.02.02a.04 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m
 
71.02.02a.05 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m
 
71.02.02a.06 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m
 
71.02.02a.06b Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m
 
71.02.02a.06c Ferroaluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m
 
71.02.02a.06d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m
 
71.02.02a.06e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2
 
71.02.02a.07 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m
 
71.02.02a.08 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m
 
71.02.02a.09 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m
 
71.02.02a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m
 
71.02.02a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m
 
71.02.02a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EC.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.15 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m
 
09.EC.15 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m
 
09.EC.15 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m
 
09.EC.15 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m
 
09.EC.15 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m
 
09.EC.15 Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m
 
09.EC.15 Ferroaluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m
 
09.EC.15 Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m
 
09.EC.15 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m
 
09.EC.15 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m
 
09.EC.15 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m
 
09.EC.15 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m
 
09.EC.15 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m
 
09.EC.15 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono
 
09.EC.15 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m
 
09.EC.15 Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2
 
09.EC.15 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
 

Other Chromphyllite Information

Help on References: References: NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p652,1998) OPTIC PROP.(AmMin)
Help on See Also: See Also: Links to other databases for Chromphyllite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Chromphyllite Specimen Label here :

Chromphyllite

(K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2
Dana No: 71.02.02a.11 Strunz No: 09.EC.15
Locality:

 

Notes:

 

 
   
 


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