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Kumdykolite (Kumdykolit)

Collectors Summary

Crystal System orthorhombisch, P2nn oder Pmnn

Chemism

Chemical formula

NaAlSi3O8

Additional chem. information

Feldspat Gruppe

Chemical composition

Aluminium, Natrium, Silicium, Sauerstoff

Unit weight: 262.2233384 u; Number of atoms in the formula: 13

Info

Empirical formula:

NaAlSi3O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

48.81

8

61.54

15.9994300

127.9954400
Sodium

Na

8.77

1

7.69

22.9897702

22.9897702
Aluminium

Al

10.29

1

7.69

26.9815382

26.9815382
Silicon

Si

32.13

3

23.08

28.0855300

84.2565900

Analysis wt%

SiO2 : 69.18, Al2O3 : 18.64, CaO : 0.09, Na2O : 12.09 (Ref: European Journal of Mineralogy 2009)

Strunz 9th edition incl. updates

9.FA.??

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
??:

Lapis Classification

VIII/J.07-079

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
7: Ohne tetraederfremde Anionen; Feldspat-Gruppe

Classification by Hölzel

9.FD.160

9: SILICATES
F: Tektosilicates
D: Plagioclase-Group

Mineral status

anerkanntes Mineral

Optical Properties

RI value α / ω / n

1.517

Ri mean

1.517

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2 oder mmm

Space Group number

34 oder 58

Space Group

P2nn oder Pmnn

Cell parameters a (Å)

8.24

Cell parameters b (Å)

8.68

Cell parameters c (Å)

4.84

Cell parameters a/b or c/a

0.949

Cell parameters c/b

0.558

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

346.172

X-Ray Powder Diffraction

5.97 (), 4.33(), 4.21(), 4.18(), 4.12(), 3.76(), 3.23(), 3.02(), 2.95(), 2.74()

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.52 (berechnet)

2.516 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Kasachstan/Aqmola oblysy/Kokchetav Massif/Kumdy Kol

Preface

Name from

nach der Typlokalität

Author (Name, Year)

Shyh-Lung Hwang, Pouyan Shen, Hao-Tsu Chu, Tzen-Fu Yui, Juhn G. Liou, and Nikolay V. Sobolev (2009)

References

Shyh-Lung Hwang, Pouyan Shen, Hao-Tsu Chu, Tzen-Fu Yui, Juhn G. Liou, and Nikolay V. Sobolev: Kumdykolite, an orthorhombic polymorph of albite, from the Kokchetav ultrahigh-pressure massif, Kazakhstan. Eur. J. Mineral. 21 (2009) S.1325-1334.

Neue Mineralien - IMA-WEB-Seite Jan. 2007

Péter Németh, Stephen W. Lehner, Michail I. Petaev, Peter R. Buseck: Kumdykolite, a high-temperature feldspar from an enstatite chondrite. American Mineralogist Vol. 98, 5-6 (2013) S. 1070-1073.

Other languages

German

Kumdykolit

Spanish

Kumdykolita

English

Kumdykolite

CNMNC (IMA)-Number

IMA 2007-049

CNMNC symbol

Symbol

Kdy

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ZDbPiR6Yr0GZAZZLfkHcMA
GUID (Global unique identifier) 89CF3664-981E-41AF-9901-964B7E41DC30
Database ID 4860