Cetineite Mineral Data

Cetineite Mineral Data

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General Cetineite Information

Chemical Formula:

(K,Na)3+x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O)

Composition:

Molecular Weight = 726.98 gm

Potassium 9.68 % K

Sodium 5.06 % Na

Antimony 60.29 % Sb

Hydrogen 0.73 % H

Sulfur 11.91 % S

Oxygen 12.32 % O

______

100.00 %

Empirical Formula:

K_1.8Na_1.6(Sb2O3)_0.9(Sb2S3)_0.9(OH)_0.5·2.4(H₂O)

Environment:

From an antimony deposit in highly silicified evaporites, on ore which has been roasted, then long weathered.

IMA Status:

Approved IMA 1987

Locality:

In the Cetine mine, 20 km southwest of Siena, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 202637

PDF 40-1458

Cetineite Image

Images:

Cetineite Valentinite

Comments: Orange-reddish acicular crystals of cetineite with white valentinite.
Location: Cetine di Cotorniano mine (Cetine mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Cetineite Crystallography

Axial Ratios:

a:c = 1:0.39205

Cell Dimensions:

a = 14.23, c = 5.579, Z = 2; V = 978.36 Den(Calc)= 2.47

Crystal System:

Hexagonal - PyramidalH-M Symbol (6) Space Group: P 6₃

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

By Intensity(I/I_o): 2.916(1), 12.41(0.8), 3(0.74),

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
P - Polyhedra On/Off
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Sabelli C , Nakai I , Katsura S , American Mineralogist , 73 (1988) p.398-404, Crystal structures of cetineite and its synthetic Na analogue, Na3.6(Sb2O3)3(SbS3)(OH)0.6.2.4(H2O)

View Additional jPOWD Structure files for Cetineite
[1]

Physical Properties of Cetineite

Cleavage:

[1000] Good

Color:

Yellow orange, Orange red.

Diaphaniety:

Transparent to Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3.5 - Copper Penny

Luster:

Resinous

Streak:

orange

Optical Properties of Cetineite

Dichroism (e):

orange.

Dichroism (w):

slightly orange brown.

Optical Data:

Uniaxial (+), w=1.74.

Calculated Properties of Cetineite

Electron Density:

r_electron=2.23 gm/cc
note: r_Cetineite=2.47 gm/cc.

Fermion Index

Fermion Index = 0.00096
Boson Index = 0.99904

Photoelectric:

PE_Cetineite= 197.89 barns/electron
U=PE_Cetineite x r_electron= 442.02 barns/cc.

Radioactivity:

GRapi = 126.30 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Cetineite - barely detectable

Cetineite Classification

Dana Class:

2.13.3.1 (2)Sulfides - Including Selenides and Tellurides

(2.13)(Oxysulfides)

(2.13.3)Dana Group

2.13.3.1 Cetineite (K,Na)3x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O) P 6₃ 6

Strunz Class:

II/F.11-30 II - Sulfides and sulphosalts

II/F - Sulfides with nonmetallic properties, Oxisulfides

II/F.11 - Kermesite - Cetineite series

II/F.11-10 Kermesite Sb2S2O P1 1

II/F.11-20 Sarabauite CaSb10O10S6 C 2/c 2/m

II/F.11-30 Cetineite (K,Na)3x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O) P 6₃ 6

Other Cetineite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Am.Min.,Vol.73,p398-404,1988) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Cetineite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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

Cetineite

(K,Na)3+x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O)
Dana No: 2.13.3.1 Strunz No: II/F.11-30
Locality:

Notes: