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Parachrysotile

A structural variant of Chrysotile
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Hardness:
2½ - 3
Crystal System:
Orthorhombic
Name:
Named in 1956 by Eric James William Whittaker from the Greek παρα "para" = beyond and chrysotile for its relationship to the root name mineral.
A polytype of Chrysotile


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Unique IdentifiersHide

Mindat ID:
3083
Long-form identifier:
mindat:1:1:3083:6
GUID
(UUID V4):
845f22e2-e74f-477f-afde-4f681b92f38d

IMA Classification of ParachrysotileHide

IMA status:
Discredited

Classification of ParachrysotileHide

Hey's CIM Ref.:
14.4.7

14 : Silicates not Containing Aluminum
4 : Silicates of Mg

Physical Properties of ParachrysotileHide

Hardness:
2½ - 3 on Mohs scale

Optical Data of ParachrysotileHide

Type:
Biaxial (-)
RI values:
nα = 1.545 - 1.569 nβ = 1.546 - 1.569 nγ = 1.553 - 1.571
2V:
Measured: 20° to 60°
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak

Crystallography of ParachrysotileHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 5.3 Å, b = 9.24 Å, c = 14.71 Å
Ratio:
a:b:c = 0.574 : 1 : 1.592
Unit Cell V:
720.38 ų (Calculated from Unit Cell)
Z:
4

Other Language Names for ParachrysotileHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for ParachrysotileHide

References for ParachrysotileHide

Localities for ParachrysotileHide

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

- 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.
Eswatini
 
  • Hhohho Region
    • Bulembu
Canadian Mineralogist (1979)
Germany
 
  • Saxony
    • Mittelsachsen
      • Claußnitz
        • Diethensdorf
Wittern (2001)
South Africa
 
  • Mpumalanga
    • Ehlanzeni District Municipality
      • Mbombela Local Municipality
        • Kaapschehoop
Cairncross et al. (1995)
USA
 
  • Nevada
    • Nye County
      • Gabbs Mining District
        • Gabbs
Castor et al. (2004)
Zimbabwe
 
  • Midlands
    • Zvishavane District
      • Zvishavane (Shabani; Shabanie; Shavani)
Mineralogical Society of America - ...
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