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Dozyite (Dozyit)

Additional Functions

Collectors Summary

Color farblos, hellviolett, hellgrün
Streak color weiß
Lustre Perlmuttglanz
Hardness (Mohs) 2.5
Cleavages vollkommen {001}
Fracture nicht genannt
Crystal System monoklin, Cm

Chemism

Chemical formula

Mg7(Al,Fe3+,Cr)2[(OH)12|Al2Si4O15]

Chemical composition

Aluminium, Chrom, Eisen, Magnesium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 856.80478824 u; Number of atoms in the formula: 54

Info

Empirical formula:

Mg7(Al0.6Fe0.3Cr0.1)2[(OH)12Al2Si4O15]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.41

12

22.22

1.0079470

12.0953640

Oxygen

O

50.42

27

50.00

15.9994300

431.9846100

Magnesium

Mg

19.86

7

12.96

24.3050600

170.1354200

Aluminium

Al

10.08

3.2

5.93

26.9815382

86.3409222

Silicon

Si

13.11

4

7.41

28.0855300

112.3421200

Chromium

Cr

1.21

0.2

0.37

51.9961600

10.3992320

Iron

Fe

3.91

0.6

1.11

55.8452000

33.5071200

Analysis wt%

SiO2 : 29.69, Al2O3 : 20.29, MgO : 34.74, FeO : 1.63, H2O : 12.20 (Ref: American Mineralogist 95)

Strunz 9th edition incl. updates

9.EC.60

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
60:Corrensit-Gruppe

Lapis Classification

VIII/H.27-095

VIII: SILIKATE
H: Schichtsilikate
27: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Serpentin-Gruppe

Classification by Hölzel

9.EH.110

9: SILICATES
E: Phyllosilicates
H: Interstratificated Micas
1: Monoclinic Rectorite-Group

Dana 8th edition

71.04.02.01

71: Phyllosilicate Minerals
04: Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings interlayered 1:1, 2:1, and octahedra
02: Interstratified Chlorite-Smectite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, hellviolett, hellgrün

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Perlmuttglanz

max. Birefringence

0.006

Birefringence chart\! Dozyite title=Birefringence chart Dozyite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.575

RI value β

1.575

RI value γ / ε

1.581

Ri mean

1.577

2V angle

Biaxial (+) 0°

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

monoklin

Class (H-M)

m

Space Group number

8

Space Group

Cm

Cell parameters a (Å)

5.323

Cell parameters b (Å)

9.214

Cell parameters c (Å)

21.45

Cell parameters a/b or c/a

0.578

Cell parameters c/b

2.328

Cell parameters α

90°

Cell parameters β

94.43

Cell parameters γ

90°

Z

2

Volumne (ų)

1048.896

X-Ray Powder Diffraction

7.1(100),
4.61(60),
3.560(80),
2.608(20),
2.557(40),
2.427(60),
1.536(70),
1.501(20)

XRD chart Dozyite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.66

2.713 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

nicht genannt

Tenacity

nicht erwähnt

Preface

Author (Name, Year)

Bailey & Banfield & Barker & Katchan, 1995

References

American Mineralogist 80 (1995), 65

Other languages

German

Dozyit

French

Dozyite

English

Dozyite

Spanish

Dozyíta

Russian

Доциит

CNMNC (IMA)-Number

IMA 1993-042

CNMNC symbol

Symbol

Doz