Urusovite Mineral Data

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General Urusovite Information

Chemical Formula:

Cu[AlAsO5]

Composition:

Molecular Weight = 245.45 gm

Aluminum 10.99 % Al 20.77 % Al₂O₃

Copper 25.89 % Cu 29.15 % Cu₂O

Arsenic 30.52 % As 46.82 % As₂O₅

Oxygen 32.59 % O

______ ______

100.00 % 96.74 % = TOTAL OXIDE

Empirical Formula:

CuAlAsO₅

Environment:

Found in a fumarole with a gas temperature of 410-420 deg C at the time of collection.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

In a fumarole at the Great fissure Tolbachik eruption, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

The name honors Vadim Sergeevich Urusov of Moscow State University, Russia.

Synonym:

IMA1998-067

Urusovite Image

Images:

Urusovite

Comments: Green urusovite grain.
Location: Northern Breakthrough, Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Crystal length 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Urusovite Crystallography

Axial Ratios:

a:b:c =0.7154:1:0.5454

Cell Dimensions:

a = 7.314, b = 10.223, c = 5.576, Z = 4; beta = 99.79° V = 410.85 Den(Calc)= 3.97

Crystal System:

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

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

By Intensity(I/I_o): 7.2(1)(100), 4.844(0.9)(011), 2.458(0.8)(211),2.656(0.6), 4.327(0.23)(111), 3.125(0.2)(211), 3.174(0.1)(121), 3.604(0.1)(200),

Forms:

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

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Crystal Structure:

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Krivovichev S V , Molchanov A V , Filatov S K , Crystallography Reports , 45 (2000) p.723-727, Crystal structure of urusovite Cu(AlAsO5): a new type of an aluminoarsenate, tetrahedral polyanion, Locality: Kamchatka peninsula, Russia

Physical Properties of Urusovite

Cleavage:

{010} Perfect

Color:

Light green.

Diaphaneity:

Translucent

Fracture:

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

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Urusovite

Gladstone-Dale:

CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1773,KC= 0.1871
Ncalc = 1.74

Optical Data:

Biaxial (-), a=1.672, b=1.718, g=1.722, bire=0.0500

Calculated Properties of Urusovite

Electron Density:

Bulk Density (Electron Density)=3.72 gm/cc
note: Specific Gravity of Urusovite =3.97 gm/cc.

Fermion Index:

Fermion Index = 0.0001564439
Boson Index = 0.9998435561

Photoelectric:

PE_Urusovite= 33.05 barns/electron
U=PE_Urusovite x rElectron Density= 122.95 barns/cc.

Radioactivity:

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

Urusovite Classification

Dana Class:

38.05.09.02 (38)Anhydrous Phosphates, etc

(38.05)with miscellaneous formulae

(38.05.09)Dana Group

38.05.09.01 Namibite CuBi2(VO4)O2 C 2/m,Cm,C 2 Mono

38.05.09.02 Urusovite! Cu[AlAsO5] P 2₁/c 2/m

Strunz Class:

08.BB.60 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1

08.BB.60 Urusovite! Cu[AlAsO5] P 2₁/c 2/m

Other Urusovite Information

References:

NAME( AmMin, v 86, p 767) PHYS. PROP.(AmMin, v 86, p 767) OPTIC PROP.(AmMin, v 86, p 767)

See Also:

Links to other databases for Urusovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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

Urusovite

Cu[AlAsO5]
Dana No: 38.05.09.02 Strunz No: 08.BB.60
Locality:

Notes: