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Dmisteinbergite

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Dmisteinbergit
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Dmisteinbergit

Kurumazawa Metagabbro Steinbruch, Katashina, Gunma, Kanto, Honshu, Japan; Bildbreite ca. 2.3 cm
Copyright: Stefan
Contribution: Stefan 2013-10-23
Locality: Kurumazawa Gabbro-Steinbruch / Katashina / Gunma, Präfektur / Kanto, Region / Honshu / Japan

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 6
Cleavages vollkommen {001}
Fracture muschelig
Solubility ++ HCl
Crystal System hexagonal, P6/mmm

Chemism

Chem­ical formula

CaAl2Si2O8

Addi­tional chem. informa­tion

Produkt aus brennenden Kohleflötzen

Chem­ical com­po­si­tion

Aluminium, Calcium, Silicium, Sauerstoff

Unit weight: 278.2079764 u; Number of atoms in the formula: 13

Info

Empirical formula:

CaAl2Si2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

46.01

8

61.54

15.9994300

127.9954400
Aluminium

Al

19.40

2

15.38

26.9815382

53.9630764
Silicon

Si

20.19

2

15.38

28.0855300

56.1710600
Calcium

Ca

14.41

1

7.69

40.0784000

40.0784000

Anal­y­sis wt%

Ø CaO : 19.29, Al2O3 : 35.39, SiO2 : 43.89 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 90)

Strunz 9th edi­tion incl. updates

9.EG.15

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
G: Doppelnetze mit sechsfach-Ringen
15:Dmisteinbergit-Gruppe

Lapis Clas­sifica­tion

VIII/J.07-075

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

Clas­sifica­tion by Hölzel

9.FA.400

9: SILICATES
F: Tektosilicates
A: Without other tetrahedral Anions

Hey's Chem­ical Index of Min­er­als

16.09.05

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

Dana 8th edi­tion

76.01.07.01

76: Tektosilicates Tectosilicate Al-Si Framework
01: Tektosilicates Tectosilicate Al-Si Framework with Al-Si frameworks

IMA sta­tus

anerkannt 1989

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

 Feldspar group

Optical Properties

Color

farblos

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.005
Birefringence chart\! Dmisteinbergite title=Birefringence chart Dmisteinbergite

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 γ / ε

1.580

Ri mean

1.577

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

6/mmm

Space Group number

191

Space Group

P6/mmm

Cell param­e­ters a (Å)

5.122

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

14.781

Cell param­e­ters a/b or c/a

2.886

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

2

Volumne (ų)

335.825

X-Ray Pow­der Diffrac­tion

4.48(60),
3.83(60),
3.73(100),
2.85(70),
2.57(80),
2.14(30),
1.847(70),
1.481(40)
XRD chart Dmisteinbergite

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)

6

VHN (Hard­ness Vick­ers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.73 (gemessen) 2.747 (berechnet)

2.751 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Frac­ture

muschelig

Tenac­ity

spröde

Insta­bil­ity

++ HCl

(Co-)Type locality

(Co-)Type locality

Russland/Ural, Föderationskreis/Tscheljabinsk, Oblast/Tscheljabinsk Kohlebecken/Kopeisk

Russland/Ural, Föderationskreis/Tscheljabinsk, Oblast/Tscheljabinsk Kohlebecken/Kopeisk/Kohlegrube Nr. 45

Preface

Rare­ness

Sehr selten

Author (Name, Year)

Chesnokov & Lotova & Nigmatulina & Pavlyuchenko & Bushmakin, 1990

Addi­tional Informa­tion

Feldspat-Gruppe (Anorthoklas-Anorthit-Banalsit-Serie)

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 119 (5) (1990), 43.

American Mineralogist 77 (1992), 446.

Acta Crystallographica 12 (1959), 465.

IMA group assignments

Other languages

German

Dmisteinbergit

Spanish

Dmisteinbergita

French

Dmisteinbergite

English

Dmisteinbergite

Russian

Дмиштейнбергит

CNMNC (IMA)-Number

IMA 1989-010

CNMNC symbol

Symbol

Dsb

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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RRUFF - References and PDF downloads - search for: Dmisteinbergite
American-Mineralogist-Crystal-Structure-Database - search for: Dmisteinbergite
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Russian pages

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Mineral Dealer

German pages

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Locations with GPS information