Paradocrasite Mineral Data

General Paradocrasite Information

Chemical Formula:

Sb2(Sb,As)2

Composition:

Molecular Weight = 463.59 gm

Antimony 91.92 % Sb

Arsenic 8.08 % As

______

100.00 %

Empirical Formula:

Sb_3.5As_0.5

Environment:

Associated with stibarsen.

IMA Status:

Approved IMA 1969

Locality:

Consuls mine at Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for "unexpected alloy"

Name Pronunciation:

Paradocrasite + Pronunciation

Paradocrasite Image

Images:

Paradocrasite

Comments: Metallic white columnar aggregates of paradocrasite.
Location: Moctezuma, Mun. de Moctezuma, Sonora. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Paradocrasite Crystallography

Axial Ratios:

a:b:c =1.7382:1:1.062

Cell Dimensions:

a = 7.252, b = 4.172, c = 4.431, Z = 1; beta = 123.13° V = 112.27 Den(Calc)= 6.86

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2

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

By Intensity(I/I_o): 3.05(1), 2.093(0.8), 2.219(0.8),

Physical Properties of Paradocrasite

Cleavage:

{???} Perfect

Color:

Silver white.

Density:

6.52

Diaphaneity:

Opaque

Fracture:

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

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

metallic

Optical Properties of Paradocrasite

RL Anisotrophism:

Strong, in vivid pinks, pale orange, yellow, pale greenish blue and pale green..

RL Color:

Bright white.

RL Pleochroism:

Distinct, from yellowish white to slightly gray white in air, pale pink-white-gray in oil.

Calculated Properties of Paradocrasite

Electron Density:

Bulk Density (Electron Density)=5.77 gm/cc
note: Specific Gravity of Paradocrasite =6.86 gm/cc.

Fermion Index:

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_{Paradocrasite}= 327.41 barns/electron
U=PE_{Paradocrasite} x rElectron Density=1,889.52 barns/cc.

Radioactivity:

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

Paradocrasite Classification

Dana Class:

01.03.03.01 (01)Native Elements

(01.03)with semi-metallic and non-metallic elements

(01.03.03)Dana Group

01.03.03.01 Paradocrasite Sb2(Sb,As)2 C 2 2

Strunz Class:

01.CA.15 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.C - Metalloids and Nonmetals

01.CA -Arsenic group elements

01.CA.15 Paradocrasite Sb2(Sb,As)2 C 2 2

Other Paradocrasite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Paradocrasite :
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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Ask about Paradocrasite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Paradocrasite

Sb2(Sb,As)2
Dana No: 01.03.03.01 Strunz No: 01.CA.15
Locality:

Notes: