Despujolsite Mineral Data (original) (raw)

General Despujolsite Information

Help on Chemical Formula: Chemical Formula:

Ca3Mn++++(SO4)2(OH)6•3(H2O)

Help on Composition: Composition:

Molecular Weight = 523.39 gm

Calcium 22.97 % Ca 32.14 % CaO

Manganese 10.50 % Mn 16.61 % MnO2

Hydrogen 2.31 % H 20.65 % H2O

Sulfur 12.25 % S 30.59 % SO3

Oxygen 51.97 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ca3Mn4+(SO4)2(OH)6•3(H2O)

Help on Environment: Environment:

Hydrothermal manganese deposit.

Help on IMA Status: IMA Status:

Approved IMA 1968

Help on Locality: Locality:

Tachgagalt, Morocco. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Pierre Despujols (1888-?), founder of the Moroccan Geologic Survey.

Help on Name Pronunciation: Name Pronunciation:

Despujolsite + Pronunciation Say DESPUJOLSITE

Help on Synonym: Synonym:

ICSD 15729

PDF 20-226

Search for Despujolsite Images

Click Here To Search Images:

Despujolsite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.257

Help on Cell Dimensions: Cell Dimensions:

a = 8.56, c = 10.76, Z = 2; V = 682.80 Den(Calc)= 2.55

Help on Crystal System: Crystal System:

Hexagonal - Ditrigonal DipyramidalH-M Symbol (6 m2) Space Group: P 62c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.34(1), 2.129(0.8), 4.26(0.8),

Click Here for Large Despujolsite 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

| | Gaudefroy C , Granger M M , Permingeat F , Protas J , Bulletin de la Societe Francaise de Mineralogie et de Cristallographie , 91 (1968) p.43-50, La despujolsite, une nouvelle espece minerale, Locality: Tachgagalt, Morocco | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Despujolsite

Help on Cleavage: Cleavage:

{???} Good

Help on Color: Color:

Lemon.

Help on Density: Density:

2.46

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Help on Hardness: Hardness:

2.5 - Finger Nail

Help on Luster: Luster:

Vitreous (Glassy)

Optical Properties of Despujolsite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2624,KPDmeas= 0.272,KC= 0.2573
Ncalc = 1.63 - 1.66

Help on Optical Data: Optical Data:

Uniaxial (+), w=1.656, e=1.682, bire=0.0260.

Calculated Properties of Despujolsite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Despujolsite =2.55 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0014820241
Boson Index = 0.9985179759

Help on Photoelectric: Photoelectric:

PEDespujolsite = 6.16 barns/electron
U=PEDespujolsite x rElectron Density= 15.90 barns/cc.

Help on Radioactivity: Radioactivity:

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

Despujolsite Classification

Help on Dana Class: Dana Class:

31.07.06.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.07)where (A+ B++)2 (XO4) Zq�x(H2O)

(31.07.06)Despujolsite Group

31.07.06.01 Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2

31.07.06.02 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2

31.07.06.03 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 63/mmc 6/m 2/m 2/m

31.07.06.04 Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 63 6 2 2

Help on Strunz Class: Strunz Class:

07.DF.25 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DF -With large and medium-sized cations

07.DF.25 Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2

07.DF.25 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 63/mmc 6/m 2/m 2/m

07.DF.25 Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 63 6 2 2

07.DF.25 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2

Other Despujolsite Information

Help on References: References:

NAME( AntBidBlaNic5) 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 Despujolsite :
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 Despujolsite using:

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

Visit our Advertisers for Despujolsite :

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

Ask about Despujolsite 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 Despujolsite Specimen Label here :

Despujolsite

Ca3Mn++++(SO4)2(OH)6•3(H2O)
Dana No: 31.07.06.01 Strunz No: 07.DF.25
Locality:

Notes: