Scainiite Mineral Data

Scainiite Mineral Data
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General Scainiite Information

Help on Chemical Formula: Chemical Formula: Pb14Sb30S54O5
Help on Composition: 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 % 
Help on Empirical Formula: Empirical Formula: Pb15.3Sb29.5S54.7O3.5
Help on Environment: Environment: In calcite veins which cut an iron and barium ore body.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: The Buca della Vena mine, southern Apuan Alps, near Pietrasanta, norhtern Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Dr. Giuseppe Scaini (1906-1988), engineer and skillful investigator of systematic and Italian mineralogy.
Help on Synonym: Synonym: ICSD 90042
  IMA1996-014
 

Scainiite Image

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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
Help on Axial Ratios: Axial Ratios: a:b:c =6.3814:1:2.9836
Help on Cell Dimensions: Cell Dimensions: a = 51.996, b = 8.148, c = 24.311, Z = 4; beta = 104.09° V = 9,989.81 Den(Calc)= 5.70
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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
Click Here for Large Scainiite Structure Window Crystal Structure:

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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

Help on Color: Color: Bluish black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Luster: Luster: Metallic
Help on Streak: Streak: probably black
 

Optical Properties of Scainiite

Help on Optical Data: Optical Data:
 

Calculated Properties of Scainiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.87 gm/cc
note: Specific Gravity of Scainiite =5.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEScainiite = 809.84 barns/electron
U=PEScainiite x rElectron Density=3,944.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scainiite is Not Radioactive
 

Scainiite Classification
Help on Dana Class: 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
Help on Strunz Class: 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
Help on References: References: NAME( MinRec, v 32, p 220) PHYS. PROP.(MinRec, v 32, p 220)
Help on See Also: 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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Scainiite

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

 

Notes: