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Atelestite Mineral Data

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General Atelestite Information

Help on Chemical  Formula: Chemical Formula: Bi8(AsO4)3(OH)5O5
Help on Composition: Composition: Molecular Weight = 2,253.63 gm
   Bismuth   74.18 %  Bi   82.70 % Bi2O3
   Arsenic    9.97 %  As   15.30 % As2O5
   Hydrogen   0.22 %  H     2.00 % H2O
   Oxygen    15.62 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi8(AsO4)3(OH)5O5
Help on Environment: Environment: As a rare secondary mineral in the oxidized zone of bismuth- and arsenic-bearing mineral deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: In Germany, in Saxony, at the Neuhilfe, the Weisser Hirsch, and the Junge Kalbe mines, Neustadtel-Schneeberg; from Gadernheim, near Bensheim, Hesse; and the Neubulach and the Schmiedes Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Derivation not explicitly stated. Probably from the Greek for "incomplete," as the composition was undetermined when the mineral was first described.
Help on Name Pronunciation: Name Pronunciation: Atelestite + Pronunciation Say ATELESTITE
Help on Synonym: Synonym: ICSD 70112
  PDF 15-735

Atelestite Image

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Comments: Double-terminated crystal of atelestite.
Location: Junge Kalbe Mine, Neustfdtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size: 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Atelestite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4663:1:0.9407
Help on Cell Dimensions: Cell Dimensions: a = 10.88, b = 7.42, c = 6.98, Z = 1; beta = 107.213° V = 538.25 Den(Calc)= 6.95
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.239(1), 3.116(0.4), 2.725(0.3),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 0 1 0) ( 1 1 0) ( 1 0 1) ( 1 0 0)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Atelestite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Green, Light yellow, Black.
Help on Density: Density: 6.82
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: white

Optical Properties of Atelestite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1664,KPDmeas= 0.1696,KC= 0.1581
Ncalc = 2.08 - 2.1
Help on Optical Data: Optical Data: Biaxial (+), a=2.14, b=2.15, g=2.18, bire=0.0400, 2V(Calc)=62, 2V(Meas)=44.

Calculated Properties of Atelestite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.82 gm/cc
note: Specific Gravity of Atelestite =6.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0000760467
Boson Index = 0.9999239533
Help on Photoelectric: Photoelectric: PEAtelestite =1,432.77 barns/electron
U=PEAtelestite x rElectron Density=8,342.18 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Atelestite is Not Radioactive

Atelestite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.11)with miscellaneous formulae
  (41.11.05)Dana Group Atelestite Bi8(AsO4)3(OH)5O5 P 21/a 2/m
Help on  Strunz Class: Strunz Class: 08.BO.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BO -With only large cations, (OH, etc.):RO4 � 1:1
08.BO.15 Atelestite Bi8(AsO4)3(OH)5O5 P 21/a 2/m
08.BO.15 Hechtsbergite! Bi2O(OH)(VO4) P 21/c 2/m
08.BO.15 Smrkovecite! Bi2O(OH)(PO4) P 21/c 2/m

Other Atelestite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Atelestite :
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

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Dana No: Strunz No: 08.BO.15





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