Dmisteinbergite Mineral Data

General Dmisteinbergite Information

Chemical Formula:

CaAl2Si2O8

Composition:

Molecular Weight = 278.21 gm

Calcium 14.41 % Ca 20.16 % CaO

Aluminum 19.40 % Al 36.65 % Al₂O₃

Silicon 20.19 % Si 43.19 % SiO₂

Oxygen 46.01 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaAl₂Si₂O₈

Environment:

Sublimate (700-900 deg C) form burning coal dump.

IMA Status:

Approved IMA 1990

Locality:

Kopeysk, Chelyabinsk coal basin, southern Ural mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Dmitri Sergeievich Steinberg (1910-1992), Russian petrographer, Institute of Geology, Ekaterinburg, Russa.

Name Pronunciation:

Dmisteinbergite + Pronunciation

Synonym:

ICSD 26486

IMA1989-010

PDF 31-248

Dmisteinbergite Image

Images:

Click Here for Larger Dmisteinbergite Image

Dmisteinbergite Wairakite

Comments: Pearly platy crystalline dmisteinbergite with dull white wairakite on matrix.
Location: Kurumazawa, Katashina, Gumma, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dmisteinbergite Crystallography

Axial Ratios:

a:c = 1:2.88578

Cell Dimensions:

a = 5.122, c = 14.781, Z = 2; V = 335.83 Den(Calc)= 2.75

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.73(1), 2.57(0.8), 2.85(0.7),

Crystal Structure:

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Takeuchi Y , Donnay G , Acta Crystallographica , 12 (1959) p.465-470, The crystal structure of hexagonal CaAl2Si2O8

Physical Properties of Dmisteinbergite

Cleavage:

{???} Perfect

Color:

Colorless.

Diaphaneity:

Transparent

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Dmisteinbergite

Gladstone-Dale:

CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.21,KC= 0.208
Ncalc = 1.57

Optical Data:

Uniaxial (+), w=1.575, e=1.58, bire=0.0050.

Calculated Properties of Dmisteinbergite

Electron Density:

Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Dmisteinbergite =2.75 gm/cc.

Fermion Index:

Fermion Index = 0.0098442021
Boson Index = 0.9901557979

Photoelectric:

PE_{Dmisteinbergite}= 3.12 barns/electron
U=PE_{Dmisteinbergite} x rElectron Density= 8.50 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dmisteinbergite is Not Radioactive

Dmisteinbergite Classification

Dana Class:

76.01.07.01 (76)Tectosilicate Al-Si Framework

(76.01)with Al-Si frameworks

(76.01.07)Dana Group

76.01.07.01 Dmisteinbergite CaAl2Si2O8 P 6/mmm 6/m 2/m 2/m

Strunz Class:

09.EG.15 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EG -Double nets with 6-membered and larger rings

09.EG.15 Dmisteinbergite CaAl2Si2O8 P 6/mmm 6/m 2/m 2/m

Other Dmisteinbergite Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Dmisteinbergite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Dmisteinbergite Specimen Label here :

Dmisteinbergite

CaAl2Si2O8
Dana No: 76.01.07.01 Strunz No: 09.EG.15
Locality:

Notes: