Clinochlore Mineral Data

Advertisment

WE BUY COLLECTIONS & SINGLE IMPORTANT SPECIMENS

General Clinochlore Information

Chemical Formula:

(Mg,Fe++)5Al(Si3Al)O10(OH)8

Composition:

Molecular Weight = 595.22 gm

Magnesium 15.31 % Mg 25.39 % MgO

Aluminum 9.07 % Al 17.13 % Al₂O₃

Iron 11.73 % Fe 15.09 % FeO

Silicon 14.16 % Si 30.28 % SiO₂

Hydrogen 1.35 % H 12.11 % H₂O

Oxygen 48.38 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_3.75Fe²⁺_1.25Si₃Al₂O₁₀(OH)₈

Environment:

Contact, hydrothermal, and regional metamorphism of mafic minerals.

IMA Status:

Valid Species (Pre-IMA) 1851

Locality:

Common world wide. Link to MinDat.org Location Data.

Name Origin:

Clinochlore from the Greek klino - "oblique" and chloros - " green." Ripidolite from the Greek rhipis - "fan" and lithos - "stone." Pennine from the Pennine Alps, Italy

Name Pronunciation:

Clinochlore + Pronunciation

Synonym:

Colerainite

Kammererite - Red

Maufite - interstratified clinochlore-lizardite

Pennine

Prochlorite

Ripidolite

Sheridanite

Clinochlore Image

Images:

Clinochlore Andradite

Comments: Transparent topazolite, the yellow variety of andradite on clinochlore.
Location: Yellow Cat Mine, New Idria District, San Benito County. California, USA. Scale: 2.7 x 2.5 cm.
© Fabre Minerals

Images:

Clinochlore

Comments: Purple clinochlore (Kammererite) crystal cluster.
Location: Kop Daglari, Turkey. Scale: 1.4 cm across.
© John Veevaert

Images:

Clinochlore Perovskite

Comments: Square, opaque perovskite on green clinochlore. Very brilliant and with large crystals (2 x 1.5 cm.).
Location: Ilmen Mountains. Chelyabinsk, Urals, Russia. Scale: 6 x 4.5 cm.
© Fabre Minerals

Clinochlore Crystallography

Axial Ratios:

a:b:c =0.5698:1:1.5376

Cell Dimensions:

a = 5.3, b = 9.3, c = 14.3, Z = 2; beta = 97° V = 699.59 Den(Calc)= 2.83

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.16(1), 4.77(0.7), 3.58(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Brown B E , Bailey S W , American Mineralogist , 48 (1963) p.42-61, Chlorite polytypism: II. Crystal structure of a one-layer Cr-chlorite, Note: variety called kammererite

View Additional jPOWD Structure files for Clinochlore
[1] [2] [3] [4] [5] [6]

Physical Properties of Clinochlore

Cleavage:

{001} Perfect

Color:

Blackish green, Bluish green, White, Yellowish green, Olive green.

Density:

2.55 - 2.75, Average = 2.65

Diaphaneity:

Transparent to translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Clinochlore

Gladstone-Dale:

CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.059 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2058,KPDmeas= 0.2197,KC= 0.2188
Ncalc = 1.56 - 1.62

Optical Data:

Biaxial (+), a=1.571-1.588, b=1.571-1.589, g=1.576-1.599, bire=0.0050-0.0110, 2V(Calc)=0-36, 2V(Meas)=0-40. Dispersion r < v.

Pleochroism (x):

pale green, pale green, or colorless.

Pleochroism (y):

pale green, pale green, or colorless.

Calculated Properties of Clinochlore

Electron Density:

Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Clinochlore =2.65 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Clinochlore= 4.59 barns/electron
U=PE_Clinochlore x rElectron Density= 12.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Clinochlore is Not Radioactive

Clinochlore Classification

Dana Class:

71.04.01.04 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.04)interlayered 1:1, 2:1, and octahedra

(71.04.01)Chlorite group (Tri-Dioctahedral)

71.04.01.01 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m

71.04.01.02 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

71.04.01.03 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

71.04.01.04 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.04.01.05 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.04.01.06 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

71.04.01.07 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

71.04.01.08 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

71.04.01.09 Orthochamosite! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

71.04.01.10 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

Strunz Class:

09.EC.55 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.55 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m

09.EC.55 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

09.EC.55 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

09.EC.55 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

09.EC.55 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2

09.EC.55 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho

09.EC.55 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m

09.EC.55 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

09.EC.55 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

09.EC.55 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1

09.EC.55 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

Other Clinochlore Information

See Also:

Links to other databases for Clinochlore :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineral and Gemstone Kingdom
16 - Mineralienatlas (Deutsch)
17 - Online Mineral Museum
18 - QUT Mineral Atlas
19 - Ruff.Info
20 - WWW-MINCRYST

Search for Clinochlore using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Clinochlore :

A Bijoux Google Search for Clinochlore
Dakota Matrix Minerals Google Search for Clinochlore
John Betts Fine Minerals Search for Clinochlore
McDougall Minerals Google Search for Clinochlore
Rock and Mineral Shows Google Search for Clinochlore
Weinrich Minerals, Inc. Google Search for Clinochlore

Ask about Clinochlore here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Clinochlore

(Mg,Fe++)5Al(Si3Al)O10(OH)8
Dana No: 71.04.01.04 Strunz No: 09.EC.55
Locality:

Notes: