Scainiite Mineral Data

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General Scainiite Information

Chemical Formula:

Pb14Sb30S54O5

Composition:

Molecular Weight = 8,571.79 gm

Antimony 41.90 % Sb

Lead 36.98 % Pb

Sulfur 20.46 % S

Oxygen 0.65 % O

______

100.00 %

Empirical Formula:

Pb_15.3Sb_29.5S_54.7O_3.5

Environment:

In calcite veins which cut an iron and barium ore body.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

The Buca della Vena mine, southern Apuan Alps, near Pietrasanta, norhtern Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Dr. Giuseppe Scaini (1906-1988), engineer and skillful investigator of systematic and Italian mineralogy.

Synonym:

ICSD 90042

IMA1996-014

Scainiite Image

Images:

Scainiite

Comments: Black metallic prismatic scainite crystals and crystalline masses on limestone.
Location: Tafone Mine, near Manciano, Grosseto, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Scainiite Crystallography

Axial Ratios:

a:b:c =6.3814:1:2.9836

Cell Dimensions:

a = 51.996, b = 8.148, c = 24.311, Z = 4; beta = 104.09° V = 9,989.81 Den(Calc)= 5.70

Crystal System:

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

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

By Intensity(I/I_o): 3.472(1)(14.04), 2.956(0.54)(12.21,12.222.052(0.46)(8.0.10,14.08, 3.041(0.35)(408), 2.28(0.22)(829), 2.827(0.2)(626,026,1

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Moelo Y , Meerschaut A , Orlandi P , Palvadeau P , European Journal of Mineralogy , 12 (2000) p.835-846, Lead-antimony sulfosalts from Tuscany (Italy):, II - Crystal structure of scainiite, Pb14Sb30S54O5,, an expanded monoclinic derivative of Ba12Bi24S48, hexagonal sub-type (zinkenite group), Locality: Tuscany, Italy

Physical Properties of Scainiite

Color:

Bluish black.

Diaphaneity:

Opaque

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Acicular - Occurs as needle-like crystals.

Luster:

Metallic

Streak:

probably black

Optical Properties of Scainiite

Optical Data:

Calculated Properties of Scainiite

Electron Density:

Bulk Density (Electron Density)=4.87 gm/cc
note: Specific Gravity of Scainiite =5.70 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Scainiite= 809.84 barns/electron
U=PE_Scainiite x rElectron Density=3,944.44 barns/cc.

Radioactivity:

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

Scainiite Classification

Dana Class:

03.08.16.01 (03)Sulfides - Sulfosalts

(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.08.16)Dana Group

03.08.16.01 Scainiite! Pb14Sb30S54O5 C 2/m 2/m

03.08.16.02 Marrucciite! Hg3Pb16Sb18S46 C 2/m 2/m

Strunz Class:

02.JB.35b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JB -Galena derivatives, with Pb

02.JB.35b Scainiite! Pb14Sb30S54O5 C 2/m 2/m

Other Scainiite Information

References:

NAME( MinRec, v 32, p 220) PHYS. PROP.(MinRec, v 32, p 220)

See Also:

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

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

Scainiite

Pb14Sb30S54O5
Dana No: 03.08.16.01 Strunz No: 02.JB.35b
Locality:

Notes: