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Kamaishilite

Additional Functions

Collectors Summary

Color farblos
Streak color weiß
Crystal System tetragonal,
Morphology Körner bis 0.1 mm

Chemism

Chemical formula

Ca2Al2SiO6(OH)2

Chemical composition

Aluminium, Calcium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 292.2167404 u; Number of atoms in the formula: 15

Info

Empirical formula:

Ca2Al2SiO6(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.69

2

13.33

1.0079470

2.0158940

Oxygen

O

43.80

8

53.33

15.9994300

127.9954400

Aluminium

Al

18.47

2

13.33

26.9815382

53.9630764

Silicon

Si

9.61

1

6.67

28.0855300

28.0855300

Calcium

Ca

27.43

2

13.33

40.0784000

80.1568000

Analysis wt%

SiO2 : 20.03, Al2O3 : 34.15, CaO : 37.42, H2O : 6.30 (Ref: Proc.Jap.Akad.81)

Strunz 9th edition incl. updates

9.FB.10

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
10:Sodalith-Gruppe

Lapis Classification

VIII/J.11-060

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
11: Mit tetraederfremden Anionen; Sodalith-Gruppe

Classification by Hölzel

9.FF.550

9: SILICATES
F: Tektosilicates
F: Sodalite-Group

Hey's Chemical Index of Minerals

16.09.11

16: Silicates Containing Aluminum and other Metals
09: Aluminosilicates of Ca

Dana 8th edition

76.02.03.06

76: Tektosilicates Tectosilicate Al-Si Framework
02: Tektosilicates Tectosilicate Al-Si Framework Feldspathoids and related species
03: Sodalite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.000

RI value α / ω / n

1.629

RI value γ / ε

1.629

Ri mean

1.629

2V angle

Uniaxial

Pleochroism

schwach

Crystallography

Crystal System

tetragonal

Cell parameters a (Å)

8.850

Cell parameters b (Å)

-

Cell parameters c (Å)

8.770

Cell parameters a/b or c/a

0.991

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

686.888

X-Ray Powder Diffraction

3.607(100),
2.799(80),
2.777(40),
2.547(40),
2.361(20),
2.351(20),
2.085(30),
2.076(20)

XRD chart Kamaishilite

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

Morphology

Körner bis 0.1 mm

Physical Properties

Density (g/cm³)

2.83

2.826 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Uchida & Iiyama, 1981

References

Proceedings of the Japan Academy B57 (1981), 239.

American Mineralogist (1982) 67, 85.

Other languages

Spanish

Kamaishilita

French

Kamaishilite

English

Kamaishilite

German

Kamaishilith

Alternative Name

Kamaishilit

CNMNC (IMA)-Number

IMA 1980-052

CNMNC symbol

Symbol

Kam