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Eskolaite

Pictures (4 Images total)

Eskolait
Views (Image: 1448621624): 1273
Eskolait

Abgerollte schwarze Kristall, BB = 3,5 mm; Fundort: Merume-Fluß, Kamakusa, Mazaruni, Distrikt, Guyana.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2015-11-27
Locality: Merume, Fluss / Kamakusa / Mazaruni, Distrikt / Guyana
Eskolait (schwarz-grau, glänzend) in Kupferkies
Views (Image: 1522836711): 1081
Eskolait (schwarz-grau, glänzend) in Kupferkies

Outokumpu-Erzfeld; Nordkarelien, Finnland. 28x23mm.

Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2018-04-04
Locality: Outokumpu-Erzfeld / Nordkarelien (Pohjois-Karjala), Landschaft / Finnland
Eskolait x
Views (Image: 1181313251): 3604
Eskolait x

Größe des Kristalls ca. 3 mm; Fundort: Outokumpu, Finnland

Collection: Andi_Y
Copyright: Andi_Y
Contribution: Andi_Y 2007-06-08
Locality: Outokumpu-Erzfeld / Nordkarelien (Pohjois-Karjala), Landschaft / Finnland
Eskolait mit Pyrrhotin
Views (Image: 1287672445): 2729
Eskolait mit Pyrrhotin

Bildbreite: 2 mm; Fundort: Outokumpu Erzfeld, Ostfinnland, Finnland

Copyright: Luigi Chiappino
Contribution: slugslayer 2010-10-21
Locality: Outokumpu-Erzfeld / Nordkarelien (Pohjois-Karjala), Landschaft / Finnland

Collectors Summary

Color grau
Streak color grün
Hardness (Mohs) 8 - 8.5
Solubility - Säuren
Crystal System trigonal, R3c

Chemism

Chem­ical formula

Cr2O3

Addi­tional chem. informa­tion

Lt. Strunz 9. Edition: auch zugehörig zur Hämatit Serie

Chem­ical com­po­si­tion

Chrom, Sauerstoff

Unit weight: 151.99061 u; Number of atoms in the formula: 5

Info

Empirical formula:

Cr2O3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

31.58

3

60.00

15.9994300

47.9982900

Chromium

Cr

68.42

2

40.00

51.9961600

103.9923200

Anal­y­sis wt%

Cr2O3 : 94.13, Fe2O3 : 0.55, V2O3 : 4.58 (Ref: American Mineralogist 58)

Strunz 9th edi­tion incl. updates

4.CB.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
B: Mit mittelgroßen Kationen
05:Korund-Gruppe

Lapis Clas­sifica­tion

IV/C.04-030

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
4: Hämatit-Gruppe

Clas­sifica­tion by Hölzel

4.CC.130

4: OXIDES
C: R2O3 Sesquioxides
C: Corundum-Group

Dana 8th edi­tion

04.03.01.03

04: Oxide Minerals
03: Simple Oxides with a cation charge of 3+ (A+++2 O3)
01: Corundum-Hematite group (Rhombohedral: R-3c)

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grau

Addi­tional color informa­tion

smaragdgrüne interne Reflektionen

Streak color

grün

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

167

Space Group

R3c

Cell param­e­ters a (Å)

4.958

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

13.60

Cell param­e­ters a/b or c/a

2.743

Cell param­e­ters c/b

-

Z

6

Volumne (ų)

289.523

X-Ray Pow­der Diffrac­tion

3.630(100),
2.665(100),
2.479(90),
2.174(50),
1.815(60),
1.675(100),
1.466(30),
1.433(50)

XRD chart Eskolaite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

8 - 8.5

VHN (Hard­ness Vick­ers)

3082 (100g)

Density (g/cm³)

5.18

5.23 ( ρ calc. Mineralienatlas )

Insta­bil­ity

- Säuren

Preface

Author (Name, Year)

Kouvo & Vuorelainen, 1958

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 179

Other languages

German

Eskolait

English

Eskolaite

French

Eskolaite

Spanish

Eskolaíta

Russian

Эсколаит

Simplified Chinese

绿铬矿

Japanese

エスコラ鉱

Alternative Name

Simplified Chinese

埃斯科拉矿

CNMNC symbol

Symbol

Esk

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

German pages

DeWikiPedia - search for: Eskolait
Google-Bilder-Suche - search for: Eskolait
Mineralienatlas.de (Forum) - search for: Eskolait

English pages

Mindat - search for: Eskolaite
Webmineral - search for:Eskolaite
Handbook-of-Mineralogy - search for: Eskolaite
RRUFF - Raman, XRD and other mineral data - search for: Eskolaite
RRUFF - References and PDF downloads - search for: Eskolaite
American-Mineralogist-Crystal-Structure-Database - search for: Eskolaite
Strahlen.org - search for: Eskolaite

Russian pages

Webmineral.ru - search for: Эсколаит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Eskolait
Crystal-Treasure.com - search for: Eskolait
Bosse - search for: Eskolait
Edelsteine Neuburg - Gundolf Fischer - search for: Eskolait

Locations with GPS information