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Scacchite

Collectors Summary

Color farblos, rose rot, braun, bräunlich rot
Streak color weiß
Solubility +++ H2O
Crystal System trigonal, R3m

Chemism

Chem­ical formula

MnCl2

Chem­ical com­po­si­tion

Chlor, Mangan

Unit weight: 125.8444499 u; Number of atoms in the formula: 3

Info

Empirical formula:

MnCl2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Chlorine

Cl

56.34

2

66.67

35.4532000

70.9064000

Manganese

Mn

43.66

1

33.33

54.9380499

54.9380499

Strunz 9th edi­tion incl. updates

3.AB.20

3: Halide (Fluoride, Chloride, Bromide, Iodide)
A: Einfache Halogenide ohne H2O
B: M:X = 1:2
20:Chloromagnesit-Gruppe

Lapis Clas­sifica­tion

III/A.07-020

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
A: Einfache Halogenide
7: Wasserfrei, Metall : Halogen = 1:2, 1:3

Clas­sifica­tion by Hölzel

3.AB.220

3: HALIDES
A: Simple Halides without H2O
B: Me/X=1/2
2: Chloromagnesite-Group

Dana 8th edi­tion

09.02.03.02

09: Halide Minerals
02: Anhydrous and Hydrated Halides where A (X)2

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, rose rot, braun, bräunlich rot

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.086

Birefringence chart\! Scacchite title=Birefringence chart Scacchite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.708

RI value γ / ε

1.622

Ri mean

1.679

2V angle

Uniaxial (-)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell param­e­ters a (Å)

3.706

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

17.569

Cell param­e­ters a/b or c/a

4.741

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

208.972

X-Ray Pow­der Diffrac­tion

5.85(100),
3.161(20),
2.592(80),
1.977(10),
1.853(20),
1.812(20),
1.766(10),
1.507(10)

XRD chart Scacchite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.977

3 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

Preface

Author (Name, Year)

Adam, 1869

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 493

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Scacchite

MnCl2

trigonal : 3m : R3m

3.AB.20

Lawrencite

(Fe2+,Ni)Cl2

trigonal : 3m : R3m

3.AB.20

'Chloromagnesite'

MgCl2

trigonal : 3m : R3m

3.AB.20

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Chloromagnesite'

MgCl2

trigonal : 3m : R3m

III/A.07-005

Lawrencite

(Fe2+,Ni)Cl2

trigonal : 3m : R3m

III/A.07-010

Scacchite

MnCl2

trigonal : 3m : R3m

III/A.07-020

Tolbachite

CuCl2

monoklin : 2/m : C2/m

III/A.07-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

'Chloromagnesite'

MgCl2

trigonal : 3m : R3m

3.AB.200

Scacchite

MnCl2

trigonal : 3m : R3m

3.AB.220

Lawrencite

(Fe2+,Ni)Cl2

trigonal : 3m : R3m

3.AB.240

Tolbachite

CuCl2

monoklin : 2/m : C2/m

3.AB.280

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Fluorite

CaF2

kubisch : m3m : Fm3m

09.02.01.01

Frankdicksonite

BaF2

kubisch : m3m : Fm3m

09.02.01.02

Tveitite-(Y)

(Y,Na)6(Ca,Na,REE)12(Ca,Na)F42

trigonal : 3 : R3

09.02.01.03

Sellaite

MgF2

tetragonal : 4/mmm : P42/mnm

09.02.02.01

Lawrencite

(Fe2+,Ni)Cl2

trigonal : 3m : R3m

09.02.03.01

Scacchite

MnCl2

trigonal : 3m : R3m

09.02.03.02

Rokühnite

Fe2+Cl2·H2O

monoklin : 2/m : C2/m

09.02.04.01

Sinjarite

CaCl2·2H2O

09.02.05.01

Antarcticite

CaCl2·6H2O

trigonal : 32 : P321

09.02.06.01

Cotunnite

PbCl2

orthorhombisch : mmm : Pnam

09.02.07.01

'Hydrophilite'

CaCl2 (?)

orthorhombisch : mmm : Pnnm

09.02.07.02

Eriochalcite

CuCl2·2H2O

orthorhombisch : mmm : Pbmn

09.02.08.01

Tolbachite

CuCl2

monoklin : 2/m : C2/m

09.02.08.02

Bischofite

MgCl2·6 H2O

monoklin : 2/m : C2/m

09.02.09.01

Nickelbischofite

NiCl2·6H2O

monoklin : 2/m : C2/m

09.02.09.02

Other languages

German

Scacchit

Spanish

Scacchita

English

Scacchite

French

Scacchite

Russian

Скаккит

Alternative Name

Italian

Protochloruro di Manganese

Scacchite (of Adam)

CNMNC symbol

Symbol

Sca

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Scacchit
Google-Bilder-Suche - search for: Scacchit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Scacchit

English pages

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Handbook-of-Mineralogy - search for: Scacchite
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RRUFF - References and PDF downloads - search for: Scacchite
American-Mineralogist-Crystal-Structure-Database - search for: Scacchite
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Russian pages

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Mineral Dealer

German pages

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