Chromphyllite Mineral Data (original) (raw)

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 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 - PrismaticH-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) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Chromphyllite Structure Window Crystal Structure:

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| | Evsyunin V G , Kashaev A A , Rastsvetaeva R K , Crystallography Reports , 42 (1997) p.571-574, Crystal structure of a new representative of Cr micas, Locality: Slyudyanka, Irkutsk, Russia | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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: