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Scacchite Mineral Data
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General Scacchite Information
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 Chemical Formula: |
MnCl2 |
| Composition: |
Molecular Weight = 125.84 gm |
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Manganese 43.66 % Mn 56.37 % MnO |
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Chlorine 56.34 % Cl 56.34 % Cl |
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- %
Cl -12.71 % -O=Cl2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+Cl2 |
| Environment: |
Product of fumarolic activity. |
| IMA Status: |
Valid Species (Pre-IMA) 1869 |
| Locality: |
Vesuvius, Campania, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Arcangelo Scacchi (1810-1893), Italian mineralogist, University of Naples, Naples, Italy. |
| Name Pronunciation: |
Scacchite + Pronunciation  |
| Synonym: |
ICSD 33752 |
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PDF 22-720 |
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Scacchite Image |
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Images:
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Scacchite Crystallography
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| Axial Ratios: |
a:c = 1:4.75 |
| Cell Dimensions: |
a = 3.68, c = 17.48, Z = 3; V = 205.01 Den(Calc)= 3.06 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 5.85(1), 2.59(0.8), 3.16(0.25), |
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Physical Properties of Scacchite
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| Cleavage: |
{0001} Perfect |
| Color: |
Colorless, Rose red, Brown, Brownish red. |
| Density: |
2.977 |
| Diaphaneity: |
Transparent |
| Streak: |
white |
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Optical Properties of Scacchite
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| Optical Data: |
Uniaxial (-), e=1.622, w=1.708, bire=0.0860. |
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Calculated Properties of Scacchite
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| Electron Density: |
Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Scacchite =3.06 gm/cc.
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| Fermion Index: |
Fermion Index = 0
Boson Index = 1 |
| Photoelectric: |
PEScacchite = 15.29 barns/electron
U=PEScacchite x rElectron Density= 43.88 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scacchite is Not Radioactive |
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Scacchite Classification
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| Dana Class: |
09.02.03.02 (09)Anhydrous and Hydrated Halides |
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(09.02)where A (X)2 |
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(09.02.03)Dana Group |
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09.02.03.01 Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m |
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09.02.03.02 Scacchite MnCl2 R 3m 3 2/m |
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09.02.03.03 Chloromagnesite* MgCl2 R 3m 3 2/m |
| Strunz Class: |
03.AB.20 03 - HALIDES |
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03.A - Simple Halides, Without H2O |
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03.AB -M:X = 1:2 |
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03.AB.20 Chloromagnesite* MgCl2 R 3m 3 2/m |
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03.AB.20 Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m |
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03.AB.20 Scacchite MnCl2 R 3m 3 2/m |
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Other Scacchite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Scacchite Specimen Label here :
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Scacchite
MnCl2
Dana No: 09.02.03.02 Strunz No: 03.AB.20
Locality:
Notes:
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