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Scacchite Mineral Data

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General Scacchite Information

Help on Chemical  Formula: Chemical Formula: MnCl2
Help on Composition: Composition: Molecular Weight = 125.84 gm
   Manganese  43.66 %  Mn   56.37 % MnO
   Chlorine   56.34 %  Cl   56.34 % Cl
                -   %   Cl  -12.71 % -O=Cl2   
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Cl2
Help on Environment: Environment: Product of fumarolic activity.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1869
Help on Locality: Locality: Vesuvius, Campania, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arcangelo Scacchi (1810-1893), Italian mineralogist, University of Naples, Naples, Italy.
Help on Name Pronunciation: Name Pronunciation: Scacchite + Pronunciation Say SCACCHITE
Help on Synonym: Synonym: ICSD 33752
  PDF 22-720

Scacchite Image

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Comments: Deliquescent reddish scacchite crust on volcanic rock.
Location: Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Scacchite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.75
Help on Cell Dimensions: Cell Dimensions: a = 3.68, c = 17.48, Z = 3; V = 205.01 Den(Calc)= 3.06
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.85(1), 2.59(0.8), 3.16(0.25),

Physical Properties of Scacchite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Rose red, Brown, Brownish red.
Help on Density: Density: 2.977
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white

Optical Properties of Scacchite

Help on Optical Data: Optical Data: Uniaxial (-), e=1.622, w=1.708, bire=0.0860.

Calculated Properties of Scacchite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Scacchite =3.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEScacchite = 15.29 barns/electron
U=PEScacchite x rElectron Density= 43.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scacchite is Not Radioactive

Scacchite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.02)where A (X)2
  (09.02.03)Dana Group Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m Scacchite MnCl2 R 3m 3 2/m Chloromagnesite* MgCl2 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 03.AB.20 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AB -M:X = 1:2
03.AB.20 Chloromagnesite* MgCl2 R 3m 3 2/m
03.AB.20 Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m
03.AB.20 Scacchite MnCl2 R 3m 3 2/m

Other Scacchite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Scacchite :
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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Dana No: Strunz No: 03.AB.20





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