Avicennite Mineral Data

General Avicennite Information

Chemical Formula:

Tl2O3

Composition:

Molecular Weight = 661.15 gm

Thallium 92.74 % Tl 103.63 % Tl₂O₃

Oxygen 7.26 % O

______ ______

100.00 % 103.63 % = TOTAL OXIDE

Empirical Formula:

Tl₃O₃

Environment:

In the weathered zone of a hematite-calcite vein cutting banded marmorized and silicified limestones near a granite-gneiss contact (near Dzhuzumli, Tadzhikistan).

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

From near the village of Dzhuzumli, Mt. Zirabulaksk region, Bukhara, Tadzhikistan. Link to MinDat.org Location Data.

Name Origin:

For the medieval (Persian) scholar and physician, Abu 'Ali al-Husayn ibn 'Abd Allah ibn Sina (Avicenna) (930-1037), who lived in Bukhara, Tadzhikistan.

Name Pronunciation:

Avicennite + Pronunciation

Synonym:

ICSD 26813

PDF 33-1404

Avicennite Image

Images:

Avicennite

Comments: Grayish black polished crystals on microprobe sample mount.
Location: Thallium Prospect, Little Valley, Tooele County, Utah, USA. Scale: See Image.
© Rruff Database

Avicennite Crystallography

Cell Dimensions:

a = 10.5468, Z = 10; V = 1,173.17 Den(Calc)= 9.36

Crystal System:

Isometric - Diploidal H-M Symbol (2/m 3) Space Group: I a3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.044(1), 1.864(0.38), 2.637(0.37),

Physical Properties of Avicennite

Cleavage:

None

Color:

Grayish black.

Density:

9.574

Diaphaneity:

Opaque

Fracture:

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

Hardness:

2 - Gypsum

Luster:

Metallic

Streak:

grayish black

Optical Properties of Avicennite

Optical Data:

Isotropic.

NCalc= 1.51 - from Gladstone-Dale relationship (KC = 0.0549) where Ncalc=Dcalc*KC+1
NCalc= 1.53 - from Gladstone-Dale relationship (KC = 0.0549) where Ncalc=Dmeas*KC+1

RL Color:

Pale to medium gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Avicennite in Air**
λ	R	∑ R(λ)
400 nm	11.50
470 nm	12.50
500 nm	13.00
546 nm	12.70
589 nm	12.30
650 nm	10.60
700 nm	11.50

**Calculated Relative Intensity Colors of Avicennite in Air**
Relative Intensity	0%	80%	100%	160%	240%	320%	400%	480%	560%	640%	720%	760%
R

Calculated Properties of Avicennite

Electron Density:

Bulk Density (Electron Density)=7.56 gm/cc
note: Specific Gravity of Avicennite =9.36 gm/cc.

Fermion Index:

Fermion Index = 0.0000348472
Boson Index = 0.9999651528

Photoelectric:

PE_Avicennite=1,688.85 barns/electron
U=PE_Avicennite x rElectron Density=12767.61 barns/cc.

Radioactivity:

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

Avicennite Classification

Dana Class:

04.03.08.01 (04)Simple Oxides

(04.03)with a cation charge of 3+ (A+++2 O3)

(04.03.08)Dana Group

04.03.08.01 Avicennite Tl2O3 I a3 2/m 3

Strunz Class:

04.CB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.C - Metal:Oxygen = 2:3, 3:5, and Similar

04.CB -With medium-sized cations

04.CB.10 Bixbyite (Mn,Fe)2O3 I a3 2/m 3

04.CB.10 Avicennite Tl2O3 I a3 2/m 3

Other Avicennite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Avicennite :
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 Avicennite using:

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

Visit our Advertisers for Avicennite :

Ask about Avicennite 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 Español

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

Avicennite

Tl2O3
Dana No: 04.03.08.01 Strunz No: 04.CB.10
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.