Uzonite Mineral Data

Uzonite Mineral Data +

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General Uzonite Information

Chemical Formula:

As4S5

Composition:

Molecular Weight = 460.02 gm

Arsenic 65.15 % As

Sulfur 34.85 % S

______

100.00 %

Empirical Formula:

As₄S₅

Environment:

As intergrowths with realgar in the pore spaces of tuffaceous sediments in a caldera.

IMA Status:

Approved IMA 1985

Locality:

Uzon caldera, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 16107

PDF 39-331

Usonite

Uzonite Image

Images:

Uzonite

Comments: Yellow powdery uzonite encrustation.
Location: Uzon Volcano, Kamchatka District, Russian Far East, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uzonite Crystallography

Axial Ratios:

a:b:c =0.9848:1:0.8829

Cell Dimensions:

a = 7.973, b = 8.096, c = 7.148, Z = 2; beta = 100.01° V = 454.38 Den(Calc)= 3.36

Crystal System:

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

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

By Intensity(I/I_o): 3.599(1)(120), 5.8042(0.74)(101), 2.8135(0.66)(220),5.3023(0.64)(011), 2.7448(0.47)(221), 2.9021(0.41)(202), 2.024(0.39)(040), 3.219(0.28)(012),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Bindi L , Popova V , Bonazzi P , The Canadian Mineralogist , 41 (2003) p.1463-1468, Uzonite, As4S5, from the type locality: Single-crystal X-ray study, and effects of exposure to light

Physical Properties of Uzonite

Cleavage:

[001] Distinct

Color:

Yellow.

Density:

3.37

Diaphaniety:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Pearly

Streak:

yellow

Optical Properties of Uzonite

Optical Data:

Biaxial (+), a=2.38, g=2.68, bire=0.3000

RL Color:

Grayish white with bright yellow internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Uzonite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	20.10	18.80
425 nm	20.00	18.80
450 nm	19.90	18.70
475 nm	19.70	18.30
500 nm	19.20	18.10
525 nm	19.80	19.00
550 nm	20.00	19.40
575 nm	19.90	19.40
600 nm	19.70	19.30
625 nm	19.40	19.20
650 nm	19.30	19.10
675 nm	19.20	19.00
700 nm	19.00	18.80

**Calculated Relative Intensity Colors of Uzonite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	480%
R₁
R₂

Calculated Properties of Uzonite

Electron Density:

r_electron=3.10 gm/cc
note: r_Uzonite=3.36 gm/cc.

Fermion Index

Fermion Index = 0.00261
Boson Index = 0.99739

Photoelectric:

PE_Uzonite= 47.63 barns/electron
U=PE_Uzonite x r_electron= 147.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Uzonite is Not Radioactive

Uzonite Classification

Dana Class:

2.8.22.3 (2)Sulfides - Including Selenides and Tellurides

(2.8)where Am Bn Xp, with (m+n):p=1:1

(2.8.22)Dana Group

2.8.22.1 Realgar AsS P 2₁/n 2/m

2.8.22.2 Pararealgar AsS P 2₁/c 2/m

2.8.22.3 Uzonite As4S5 P 2₁/m 2/m

2.8.22.4 Alacranite As8S9 P 2/c 2/m

Strunz Class:

II/F.02-60 II - Sulfides and sulphosalts

II/F - Sulfides with nonmetallic properties, Arsenic-Sulfides

II/F.02 - Duranusite - Jeromite series

II/F.02-10 Duranusite As4S Unk Ortho

II/F.02-20 Dimorphite As4S3 P nma 2/m 2/m 2/m

II/F.02-30 Realgar AsS P 2₁/n 2/m

II/F.02-40 Pararealgar AsS P 2₁/c 2/m

II/F.02-50 Alacranite As8S9 P 2/c 2/m

II/F.02-60 Uzonite As4S5 P 2₁/m 2/m

II/F.02-70 Orpiment As2S3 P 2₁/n 2/m

II/F.02-80 Laphamite As2(Se,S)3 P 2₁/n 2/m

II/F.02-90 Jeromite As(S,Se)2 None

Other Uzonite Information

References:

NAME( Athena) PHYS. PROP.(Dana8, CanMin v 41, p 1463) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Uzonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Uzonite

As4S5
Dana No: 2.8.22.3 Strunz No: II/F.02-60
Locality:

Notes: