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Parachrysotile

Collectors Summary

Color grün, rot, gelb, weiß
Streak color weiß
Hardness (Mohs) 2.5 - 3
Crystal System orthorhombisch,

Additional information / Summary

kein eigenständiges Mineral; Polytyp oder kristallographische Variante von Chrysotil (Can. Mineral. 13 (1975), 227-243)

Chemism

Chemical formula

Mg3Si2O5(OH)4

Additional chem. information

Polytyp oder Kristallographisch Variante von Chrysotil

Chemical composition

Magnesium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 277.112898 u; Number of atoms in the formula: 18

Info

Empirical formula:

Mg3Si2O5(OH)4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.45

4

22.22

1.0079470

4.0317880

Oxygen

O

51.96

9

50.00

15.9994300

143.9948700

Magnesium

Mg

26.31

3

16.67

24.3050600

72.9151800

Silicon

Si

20.27

2

11.11

28.0855300

56.1710600

Analysis wt%

SiO2 : 43.37, MgO : 43.63, H2O : 13.00 (Ref: berechnet)

Strunz 9th edition incl. updates

9.ED.15

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
D: Schichtsilikate (Phyllosilikate) mit [Kaolinit]-Schichten, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
15:Serpentin-Gruppe

Classification by Hölzel

9.EM.248

9: SILICATES
E: Phyllosilicates
M: Serpentine-Group
2: Amesite-Group

Hey's Chemical Index of Minerals

14.04.07

14: Silicates not Containing Aluminum
04: Silicates of Mg

Dana 8th edition

71.01.02d.03

71: Phyllosilicate Minerals
01: Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 1:1 layers
02d: Serpentine group (Chrysotile subgroup)

IMA status

Diskreditiert 2006, kein eigenständiges Mineral; Polytyp oder Kristallographisch Variante von Chrysotil (Can. Mineral. 13 (1975), 227-243)

Mineral status

Polytype

Variety / polytype of

Chrysotile

Optical Properties

Color

grün, rot, gelb, weiß

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend bis opak

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

orthorhombisch

Cell parameters a (Å)

5.3

Cell parameters b (Å)

9.24

Cell parameters c (Å)

14.71

Cell parameters c/b

1.592

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Physical Properties

Hardness (Mohs)

2.5 - 3

Density (g/cm³)

2.53 - 2.65 (gemessen) 2.56 (berechnet)

Preface

Author (Name, Year)

Whittaker & Zussman, 1956

References

American Mineralogist (1957): 42: 585.

Canadian Mineralogist Vol. 13 (1975), 227-243.

The Canadian Mineralogist Vol. 44, pp. 1557-1560 (2006).

Whittaker, E.J.W. (1956b) The structure of chrysotile . IV. Parachrysotile. Acta Crystallographica 9, 865-867.

Other languages

German

Parachrysotil

English

Parachrysotile

French

Parachrysotile

Spanish

Paracrisotilo

Russian

Парахризотил

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 6-WEChJPO0alhfkRZfS6EQ
GUID (Global unique identifier) 0A84E5EB-4F12-463B-A585-F91165F4BA11
Database ID 2911