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George-ericksenite (Gek)

Pictures (1 Images total)

George-Ericksenit
Views (File:
1679855919
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George-Ericksenit
erdige, gelbliche Aggregate von George-Ericksenit auf einer Matrix von Halit mit Nitratin, Oficina Chacabuco, Sierra Gorda District, Antofagasta Province, Chile; BB ~ 1 cm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Sierra Gorda
Mineral: George-ericksenite
Image: 1679855919
License: Usage for Mineralienatlas project only
George-Ericksenit

erdige, gelbliche Aggregate von George-Ericksenit auf einer Matrix von Halit mit Nitratin, Oficina Chacabuco, Sierra Gorda District, Antofagasta Province, Chile; BB 1 cm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2023-03-26
Locality: Sierra Gorda / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Color blassgelb, zitronengelb
Streak color blassgelb
Hardness (Mohs) 3.00 - 4.00
Cleavages keine beobachtet
Solubility +++ H2O
Crystal System monoklin, C2/c

Chemism

Chemical formula

Na6CaMg[(IO3)6|(CrO4,SO4)2]·12H2O

Chemical composition

Calcium, Chrom, Magnesium, Natrium, Iod, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1689.9449772 u; Number of atoms in the formula: 78

Info

Empirical formula:

Na6CaMg[(IO3)6((CrO4)0.75(SO4)0.25)2]·12H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.43

24

30.77

1.0079470

24.1907280
Oxygen

O

35.98

38

48.72

15.9994300

607.9783400
Sodium

Na

8.16

6

7.69

22.9897702

137.9386212
Magnesium

Mg

1.44

1

1.28

24.3050600

24.3050600
Sulfur

S

0.95

0.5

0.64

32.0655000

16.0327500
Calcium

Ca

2.37

1

1.28

40.0784000

40.0784000
Chromium

Cr

4.62

1.5

1.92

51.9961600

77.9942400
Iodine

I

45.06

6

7.69

126.9044730

761.4268380

Strunz 9th edition incl. updates

4.KD.10

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
K: Iodate
D: Iodate mit weitere [Anionen], mit H20
10:Georgeericksenit-Gruppe

Lapis Classification

VI/D.16-070

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
D: Wasserhaltige Sulfate, mit fremden Anionen
16: Mittelgroße und sehr große Kationen

Classification by Hölzel

5.OD.230

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
O: Iodates
D: Iodates (+Anions +Water)

Dana 8th edition

23.01.02.03

23: Compound Iodates
01: Compound Iodates with miscellaneous formulae
02: Fuenzalidaite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blassgelb, zitronengelb

Streak color

blassgelb

max. Birefringence

0.057
Birefringence chart\! George-ericksenite title=Birefringence chart George-ericksenite

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

1.647

RI value β

1.674

RI value γ / ε

1.704

Ri mean

1.675

2V angle

Biaxial (+) 88°c

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

23.645

Cell parameters b (Å)

10.918

Cell parameters c (Å)

15.768

Cell parameters a/b or c/a

2.166

Cell parameters c/b

1.444

Cell parameters α

90°

Cell parameters β

114.42

Cell parameters γ

90°

Z

4

Volume (ų)

3706.447

X-Ray Powder Diffraction

10.7(100),
6.36(50),
5.65(50),
4.36(40),
3.590(70),
3.121(80),
3.051(80),
1.913(40)
XRD chart George-ericksenite

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)

3.00 - 4.00

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.035 (berechnet)

3.028 ( ρ calc. Mineralienatlas )

Cleavages

keine beobachtet

Tenacity

spröde

Instability

+++ H2O

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Sierra Gorda/Oficina Chacabuco

Preface

Author (Name, Year)

Cooper & Hawthorne & Roberts & Grice & Stirling & Moffatt, 1998

References

American Mineralogist 83 (1998), 390

Other languages

German

George-Ericksenit

Spanish

George-ericksenita

French

George-ericksenite

English

George-ericksenite

Tidying up Mineral Names

Russian

Джорджэриксенит

Alternative Name

German

Georgeericksenit

English

Georgeericksenite

CNMNC (IMA)-Number

IMA 1996-049

CNMNC symbol

Symbol

Gek

IDs

GUSID (Global unique identifier short form) 1K9diTxg00m1pIt3tlDK6A
GUID (Global unique identifier) 895DAFD4-603C-49D3-B5A4-8B77B650CAE8
Database ID 1362