Clinochrysotile (original) (raw)
About ClinochrysotileHide
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Colour:
Pale green to white, also yellow to brown, light gray.
Lustre:
Resinous, Greasy, Silky
Specific Gravity:
2.53 - 2.55
Crystal System:
Monoclinic
Name:
Named in 1843 by Franz von Kobell from the Greek chrysos - "gold" and tilos - "fiber." Re-named clinochrysotile by Eric James William Whittaker in 1951. This is by far the most common chrysotile structure and the most common commercial asbestos mineral. Chrysotile was reinstated as the species name of the chrysotile polytypes in 2006.
A polytype of Chrysotile
Clinochrysotile represents the monoclinic or triclinic polymorphs of chrysotile.
Whereas chrysotile (asbestos) has been known since ancient times from many localities, specimens from the Bell mine, one of the oldest mines in the Thetford Mines area (in operation since 1877), have been the subjects of most of the early structural studies, from which the chrysotile nomenclature was defined. These investigations identified monoclinic (Warren & Bragg 1930), and triclinic (Padurow 1950, Whittaker 1956a) polymorphs from the Bell mine, which should be considered the type locality. Clinochrysotile is no longer a valid species (Burke 2006).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1071:5
43531030-88c1-4e95-ac8f-6f14086ac278
IMA Classification of ClinochrysotileHide
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IMA status notes:
Redefined by the IMA, Renamed by the IMA
Approval history:
Renamed by IMA: 2006
Classification of ClinochrysotileHide
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9.ED.
9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
71.1.2d.1
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
14.4.5
14 : Silicates not Containing Aluminum
4 : Silicates of Mg
Physical Properties of ClinochrysotileHide
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Colour:
Pale green to white, also yellow to brown, light gray.
Parting:
Cylinders of chrysotile separate as fine flexible threads or fibers.
Density:
2.53 - 2.55 g/cm3 (Measured) 2.63 g/cm3 (Calculated)
Optical Data of ClinochrysotileHide
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RI values:
_n_α = 1.545 - 1.569 _n_β = 1.546 - 1.569 _n_γ = 1.553 - 1.571
Birefringence:
0.001-0.008
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
relatively weak
Optical Extinction:
Inclined
Pleochroism:
Non-pleochroic
Comments:
May be weakly pleochroic
Crystallography of ClinochrysotileHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.3 Å, b = 9.19 Å, c = 14.63 Å
β = 93°
Ratio:
a:b:c = 0.577 : 1 : 1.592
Unit Cell V:
711.61 ų (Calculated from Unit Cell)
Morphology:
Fibrous, although fine-grained clinochrysotile may be dense and homogeneous in appearance.
Comment:
Settings include Cc and C2/m. Falini et al. (2004) give a = 5.340, b = 9.241, c = 14.689 Å, β = 93.66° (space group Cc).
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.1 Å | (90) |
| 4.60 Å | (20) |
| 4.40 Å | (20) |
| 4.07 Å | (10) |
| 3.55 Å | (60) |
| 2.65 Å | (30) |
| 2.39 Å | (100) |
| 2.001 Å | (30) |
Comments:
21-1262 [Cc space group]
Synonyms of ClinochrysotileHide
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Other Language Names for ClinochrysotileHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.ED.05 | Dickite | Al2(Si2O5)(OH)4 | Mon. m : B b |
|---|---|---|---|
| 9.ED.05 | Kaolinite | Al2(Si2O5)(OH)4 | Tric. 1 : _P_1 |
| 9.ED.05 | Nacrite | Al2(Si2O5)(OH)4 | Mon. m : B b |
| 9.ED.05 | Odinite | (Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4 | Mon. m : B m |
| 9.ED.10 | Halloysite | Al2(Si2O5)(OH)4 | Mon. m : B b |
| 9.ED.10 | Hisingerite | Fe3+2(Si2O5)(OH)4 · 2H2O | Mon. |
| 9.ED.10 | Hydrohalloysite | Al2Si2O5(OH)4 · 2H2O | Mon. m |
| 9.ED.15 | Amesite | Mg2Al(AlSiO5)(OH)4 | Tric. 1 : _P_1 |
| 9.ED.15 | Antigorite | Mg3(Si2O5)(OH)4 | Mon. m : B m |
| 9.ED.15 | Berthierine | (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4 | Mon. m : B m |
| 9.ED.15 | Brindleyite | (Ni,Al)3(Si,Al)2O5(OH)4 | Mon. |
| 9.ED.15 | Caryopilite | Mn2+3Si2O5(OH)4 | Mon. |
| 9.ED.15 | Cronstedtite | Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4 | Trig. 3_m_ : P_31_m |
| 9.ED.15 | Fraipontite | (Zn,Al)3((Si,Al)2O5)(OH)4 | Mon. |
| 9.ED.15 | Greenalite | (Fe2+,Fe3+)2-3Si2O5(OH)4 | Mon. |
| 9.ED.15 | Kellyite | Mn2+2Al(AlSiO5)(OH)4 | Hex. 6 : _P_63 |
| 9.ED.15 | Lizardite | Mg3(Si2O5)(OH)4 | Trig. 3_m_ : P_31_m |
| 9.ED.15 | Manandonite | Li2Al4(Si2AlB)O10(OH)8 | Orth. 222 : _C_2221 |
| 9.ED.15 | Népouite | Ni3Si2O5(OH)4 | Orth. |
| 9.ED.15 | Pecoraite | Ni3(Si2O5)(OH)4 | Mon. |
| 9.ED.15 | Guidottiite | Mn2Fe3+(Fe3+SiO5)(OH)4 | Hex. 6 : _P_63 |
| 9.ED.15 va | Chromoamesite | Mg2(Al,Cr)(AlSiO5)(OH)4 | |
| 9.ED.20 | Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O | Amor. |
| 9.ED.20 | Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 | Orth. |
| 9.ED.20 | Imogolite | Al2SiO3(OH)4 | |
| 9.ED.20 | Neotocite | (Mn,Fe,Mg)SiO3 · H2O | Amor. |
| 9.ED.25 | Bismutoferrite | Fe3+2Bi(SiO4)2(OH) | Mon. m : B m |
| 9.ED.25 | Chapmanite | Fe3+2Sb3+(Si2O5)O3(OH) | Mon. m : B m |
| 9.ED.30 | Pianlinite | Al2Si2O6(OH)2 | Orth. |
Fluorescence of ClinochrysotileHide
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Other InformationHide
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Health Risks:
Safe when in large chunks or fragments. Fine particles which can be airborne should be avoided. Low-level frequent dust exposure may cause lung cancer.
Internet Links for ClinochrysotileHide
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References for ClinochrysotileHide
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Reference List:
Localities for ClinochrysotileHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.