Rooseveltite Mineral Data

Rooseveltite Mineral Data
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General Rooseveltite Information

Help on Chemical Formula: Chemical Formula: BiAsO4
Help on Composition: Composition: Molecular Weight = 347.90 gm
   Bismuth  60.07 %  Bi   66.97 % Bi2O3
   Arsenic  21.54 %  As   33.03 % As2O5
   Oxygen   18.40 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi(AsO4)
Help on Environment: Environment: Cassiterite veinlets in rhyolite-dacite lava flows
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1946
Help on Locality: Locality: Santiaguillo, west of Maragua, Potosi, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Franklin Delano Roosevelt (1882-1945), 32nd President of the USA.
Help on Name Pronunciation: Name Pronunciation: Rooseveltite + Pronunciation Say ROOSEVELTITE
Help on Synonym: Synonym: ICSD 27199
  PDF 25-89
 

Rooseveltite Image

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Rooseveltite

Comments: Gray glassy crystalline rooseveltite with purple fluorite.
Location: Josef Fluorite Mine, Krune Hora Mountains, near Teplice, Seversocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rooseveltite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9606:1:0.9399
Help on Cell Dimensions: Cell Dimensions: a = 6.882, b = 7.164, c = 6.734, Z = 4; beta = 104.83° V = 320.94 Den(Calc)= 7.20
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.15(1), 2.96(0.7), 4.82(0.4),
Click Here for Large Rooseveltite Structure Window Crystal Structure:

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Bedlivy D , Mereiter K , Acta Crystallographica, Section B , 38 (1982) p.1559-1561, Structure of alpha-BiAsO4 (rooseveltite), Locality: synthetic, Note: AnisoU s from ICSD

 

Physical Properties of Rooseveltite

Help on Color: Color: Gray, Gray white.
Help on Density: Density: 6.86
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Rooseveltite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1606,KPDmeas= 0.1686,KC= 0.156
Ncalc = 2.07 - 2.12
Help on Optical Data: Optical Data: Biaxial (+), a=2.14, b=2.15, g=2.18, bire=0.0400, 2V(Calc)=62, 2V(Meas)=50.
 

Calculated Properties of Rooseveltite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.13 gm/cc
note: Specific Gravity of Rooseveltite =7.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0000888987
Boson Index = 0.9999111013
Help on Photoelectric: Photoelectric: PERooseveltite =1,152.58 barns/electron
U=PERooseveltite x rElectron Density=7,060.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rooseveltite is Not Radioactive
 

Rooseveltite Classification
Help on Dana Class: Dana Class: 38.04.04.01 (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.04)Dana Group
 
38.04.04.01 Rooseveltite BiAsO4 P 2/m 2/m
Help on Strunz Class: Strunz Class: 08.AD.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
 
08.AD.50 Brabantite? CaTh(PO4)2 P 21 2
 
08.AD.50 Gasparite-(Ce) CeAsO4 P 21/n 2/m
 
08.AD.50 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 21/n 2/m
 
08.AD.50 Monazite-(La) (La,Ce,Nd)PO4 P 21/n 2/m
 
08.AD.50 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 21/n 2/m
 
08.AD.50 Rooseveltite BiAsO4 P 2/m 2/m
 
08.AD.50 Monazite-(Sm)! SmPO4 P 21/n 2/m
 

Other Rooseveltite 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 Rooseveltite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Ask about Rooseveltite here :
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Rooseveltite Specimen Label here :

Rooseveltite

BiAsO4
Dana No: 38.04.04.01 Strunz No: 08.AD.50
Locality:

 

Notes: