Dmisteinbergite Mineral Data

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

IMA Status:

Approved IMA 1990

Locality:

Link to MinDat.org Location Data.

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),

Physical Properties of Dmisteinbergite

Cleavage:

[???] Perfect

Color:

Colorless.

Diaphaniety:

Transparent

Hardness:

6 - Orthoclase

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

Optical Data:

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

Calculated Properties of Dmisteinbergite

Electron Density:

r_electron=2.73 gm/cc
note: r_{Dmisteinbergite}=2.75 gm/cc.

Fermion Index

Fermion Index = 0.00984
Boson Index = 0.99016

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Dmisteinbergite is Not Radioactive

Dmisteinbergite Classification

Dana Class:

76.1.7.1 (76)Tectosilicate Al-Si Framework

(76.1)with Al-Si frameworks

(76.1.7)Dana Group

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

Strunz Class:

VIII/J.07-75 VIII - Silicates

VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders

VIII/J.07 - Feldspar group, Anorthoclase - Anorthite - Banalcite series

VIII/J.07-10 Anorthoclase (Na,K)AlSi3O8 C1 1

VIII/J.07-20 Albite NaAlSi3O8 C1 1

VIII/J.07-30 Oligoclase (Na,Ca)(Si,Al)4O8 C1 1

VIII/J.07-40 Andesine* (Na,Ca)(Si,Al)4O8 C1 1

VIII/J.07-50 Labradorite* (Ca,Na)(Si,Al)4O8 C1 1

VIII/J.07-60 Bytownite* (Ca,Na)(Si,Al)4O8 C1 1

VIII/J.07-70 Anorthite CaAl2Si2O8 P1,I1 1

VIII/J.07-75 Dmisteinbergite CaAl2Si2O8 P 6/mmm 6/m 2/m 2/m

VIII/J.07-80 Svyatoslavite CaAl2Si2O8 P 2₁ 2

VIII/J.07-90 Stronalsite SrNa2Al4Si4O16 I bam,Iba2 Ortho

VIII/J.07-100 Banalsite BaNa2Al4Si4O16 I bam 2/m 2/m 2/m

VIII/J.07-110 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m

Other Dmisteinbergite Information

References:

PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

Search for Dmisteinbergite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Dmisteinbergite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Dmisteinbergite Mineral Data :

Ask about Dmisteinbergite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Dmisteinbergite

CaAl2Si2O8
Dana No: 76.1.7.1 Strunz No: VIII/J.07-75
Locality:

Notes: