Cymrite Mineral Data (original) (raw)

General Cymrite Information

Help on Chemical Formula: Chemical Formula:

BaAl2Si2O8•(H2O)

Help on Composition: Composition:

Molecular Weight = 393.47 gm

Barium 34.90 % Ba 38.97 % BaO

Aluminum 13.71 % Al 25.91 % Al2O3

Silicon 14.28 % Si 30.54 % SiO2

Hydrogen 0.51 % H 4.58 % H2O

Oxygen 36.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

BaAl2Si2O8•(H2O)

Help on Environment: Environment:

Bedded manganese ore deposits that have undergone low- and medium-grade metamorphism.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1949

Help on Locality: Locality:

Bennalt mine, Rhiw, Carnarvonshire, Scotland. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Cymru, the old Welsh name for Wales.

Help on Synonym: Synonym:

ICSD 39400

PDF 17-507

Cymrite Image

Click Here for Larger Cymrite Image in a New Browser Window Images:

Cymrite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.1456:1:0.2095

Help on Cell Dimensions: Cell Dimensions:

a = 5.33, b = 36.6, c = 7.67, Z = 8; beta = 90° V = 1,496.25 Den(Calc)= 3.49

Help on Crystal System: Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21 (pseudo-HEX)

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.96(1), 3.96(0.9), 2.67(0.7),

Click Here for Large Cymrite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Drits V A , Kashaev A A , Sokolova G V , Soviet Physics Crystallography , 20 (1975) p.171-175, Crystal structure of cymrite, Note: Y(O11) corrected | | ------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Cymrite

Help on Cleavage: Cleavage:

{001} Good, {101} Fair

Help on Color: Color:

Brown, Colorless, Green, Dark green.

Help on Density: Density:

3.41

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Platy - Sheet forms (e.g. micas).

Help on Hardness: Hardness:

2-3 - Gypsum-Calcite

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous - Silky

Help on Streak: Streak:

white

Optical Properties of Cymrite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1768,KPDmeas= 0.1809,KC= 0.1826
Ncalc = 1.62 - 1.64

Help on Optical Data: Optical Data:

Biaxial (-), a=1.611, b=1.619, g=1.621, bire=0.0100

Help on Pleochroism (x): Pleochroism (x):

colorless.

Help on Pleochroism (y): Pleochroism (y):

colorless.

Help on Pleochroism (z): Pleochroism (z):

colorless.

Calculated Properties of Cymrite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Cymrite =3.41 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Help on Photoelectric: Photoelectric:

PECymrite = 150.59 barns/electron
U=PECymrite x rElectron Density= 480.28 barns/cc.

Help on Radioactivity: Radioactivity:

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

Cymrite Classification

Help on Dana Class: Dana Class:

78.01.03.01 (78)Unclassified silicates

(78.01)possible nesosilicates

(78.01.03)Dana Group

78.01.03.01 Cymrite BaAl2Si2O8•(H2O) P 21 (pseudo-HEX) 2

Help on Strunz Class: Strunz Class:

09.EG.05 09 - SILICATES (Germanates)

09.E - Phyllosilicates

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

09.EG.05 Cymrite BaAl2Si2O8•(H2O) P 21 (pseudo-HEX) 2

Other Cymrite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

Help on See Also: See Also:

Links to other databases for Cymrite :
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
15 - WWW-MINCRYST

Search for Cymrite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Cymrite :

A Bijoux Google Search for Cymrite
Adam's Minerals Google Search for Cymrite
Cape Minerals Google Search for Cymrite
Dakota Matrix Minerals Google Search for Cymrite
Excalibur Mineral Corp. Google Search for Cymrite
Exceptional Minerals Google Search for Cymrite
John Betts Fine Minerals Search for Cymrite
McDougall Minerals Google Search for Cymrite
Mineral News Website Link
Rock and Mineral Shows Google Search for Cymrite
Weinrich Minerals, Inc. Google Search for Cymrite

Ask about Cymrite 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 Espa�ol

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

Cymrite

BaAl2Si2O8•(H2O)
Dana No: 78.01.03.01 Strunz No: 09.EG.05
Locality:

Notes: