Davreuxite Mineral Data (original) (raw)

General Davreuxite Information

Help on Chemical Formula: Chemical Formula:

MnAl6Si4O17(OH)2

Help on Composition: Composition:

Molecular Weight = 635.17 gm

Manganese 8.65 % Mn 11.17 % MnO

Aluminum 25.49 % Al 48.16 % Al2O3

Silicon 17.69 % Si 37.84 % SiO2

Hydrogen 0.32 % H 2.84 % H2O

Oxygen 47.86 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Mn2+Al6Si4O17(OH)2

Help on Environment: Environment:

In quartz veins cutting Mn, Al-rich metapelites, derived from shales subjected to low-grade metamorphism.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1878

Help on Locality: Locality:

In Belgium, in the Stavelot massif, at Ottr�e, at Sart-Close, near Salmchateau, at Regne, and at Recht. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Charles Joseph Davreux (1800-1863), Belgian pharmacist and natural scientist, Professor of Mineralogy at the University of Li�ege, Belgium.

Help on Name Pronunciation: Name Pronunciation:

Davreuxite + Pronunciation Say DAVREUXITE

Help on Synonym: Synonym:

ICSD 30870

PDF 37-431

Davreuxite Image

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

Davreuxite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.6559:1:2.0941

Help on Cell Dimensions: Cell Dimensions:

a = 9.55, b = 5.767, c = 12.077, Z = 2; beta = 108.1° V = 632.23 Den(Calc)= 3.34

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.511(1), 2.87(0.6), 3.103(0.45),

Click Here for Large Davreuxite 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

| | Sahl K , Jones P G , Sheldrick G M , American Mineralogist , 69 (1984) p.783-787, The crystal structure of davreuxite, MnAl6Si4O17(OH)2 | | ------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Davreuxite

Help on Cleavage: Cleavage:

{100} Good

Help on Color: Color:

Cream white, Light pink.

Help on Density: Density:

3.15

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Hardness: Hardness:

2-3 - Gypsum-Calcite

Help on Luster: Luster:

Silky

Help on Streak: Streak:

white

Optical Properties of Davreuxite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.203,KPDmeas= 0.2152,KC= 0.21
Ncalc = 1.66 - 1.7

Help on Optical Data: Optical Data:

Biaxial (-), a=1.66, b=1.684, g=1.69, bire=0.0300, 2V(Calc)=52, 2V(Meas)=48.

Calculated Properties of Davreuxite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Davreuxite =3.15 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0084899418
Boson Index = 0.9915100582

Help on Photoelectric: Photoelectric:

PEDavreuxite = 3.60 barns/electron
U=PEDavreuxite x rElectron Density= 11.19 barns/cc.

Help on Radioactivity: Radioactivity:

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

Davreuxite Classification

Help on Dana Class: Dana Class:

58.01.02.01 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.01)with cations in [4] and higher coordination; single and double groups (n=1,2)

(58.01.02)Dana Group

58.01.02.01 Davreuxite MnAl6Si4O17(OH)2 P 21/m 2/m

Help on Strunz Class: Strunz Class:

09.BF.15 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BF -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BF.15 Davreuxite MnAl6Si4O17(OH)2 P 21/m 2/m

Other Davreuxite Information

Help on References: References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Davreuxite :
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 Davreuxite using:

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

Visit our Advertisers for Davreuxite :

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

Ask about Davreuxite 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 Davreuxite Specimen Label here :

Davreuxite

MnAl6Si4O17(OH)2
Dana No: 58.01.02.01 Strunz No: 09.BF.15
Locality:

Notes: