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: |
Mg3.75Fe2+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 |
Synonym: |
Colerainite |
| |
Kammererite - Red |
| |
Pennine |
| |
Penninite |
| |
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 |
X Ray Diffraction: |
By Intensity(I/Io): 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 |
Diaphaniety: |
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: |
None. |
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 |
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. |
Pleochroism (z): |
pale yellowish green, colorless, or pale brownish yellow. |
| |
Calculated Properties of Clinochlore
|
Electron Density: |
relectron=2.65 gm/cc note: rClinochlore =2.65 gm/cc. |
Fermion Index |
Fermion Index = 0.02464 Boson Index = 0.97536 |
Photoelectric: |
PEClinochlore = 4.59 barns/electron U=PEClinochlore x relectron= 12.16 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Clinochlore is Not Radioactive |
| |
Clinochlore Classification
|
Dana Class: |
71.4.1.4 (71)Phyllosilicate Sheets of Six-Membered Rings |
| |
(71.4)interlayered 1:1, 2:1, and octahedra |
| |
(71.4.1)Chlorite group (Tri-Dioctahedral) |
| |
71.4.1.1 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m |
| |
71.4.1.2 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m |
| |
71.4.1.3 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m |
| |
71.4.1.4 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
71.4.1.5 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
71.4.1.6 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri |
| |
71.4.1.7 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m |
| |
71.4.1.8 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
71.4.1.9 Orthochamosite! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho |
| |
71.4.1.10 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m |
Strunz Class: |
VIII/H.23-20 VIII - Silicates |
| |
VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups |
| |
VIII/H.23 - Chlorite group |
| |
VIII/H.23-10 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m |
| |
VIII/H.23-20 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
VIII/H.23-30 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m |
| |
VIII/H.23-40 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho |
| |
VIII/H.23-50 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri |
| |
VIII/H.23-60 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
VIII/H.23-70 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m |
| |
VIII/H.23-80 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho |
| |
VIII/H.23-90 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m |
| |
VIII/H.23-95 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m |
| |
VIII/H.23-100 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1 |
| |
VIII/H.23-110 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2 |
| |
Other Clinochlore Information
|
References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) |
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 - Applied Mineralogy
6 -Athena
7 - Crocoite.com Mineral Locations
8 - EUROmin Project
9 - Franklin Minerals(Dunn)
10 -Google Images
11 -Google Scholar
12 -Handbook of Mineralogy (MinSocAm)
13 -Handbook of Mineralogy (UofA)
14 -MinDAT
15 -MinMax(Deutsch)
16 -MinMax(English)
17 -Mineralienatlas (Deutsch)
18 -QUT Mineral Atlas
19 - WWW-MINCRYST
20 -École des Mines de Paris
Search for Clinochlore using:
[ALTAVISTA]
[AOL]
[About.com]
[All-The-Web]
[HotBot]
[Ixquick]
[LookSmart]
[MAMMA]
[MSN.COM]
[Netscape]
[Teoma]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Clinochlore :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop
Translate Clinochlore Mineral Data :
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: 71.4.1.4 Strunz No: VIII/H.23-20
Locality:
Notes:
|
|
| |
| |
|
| |