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Iquiqueite (Iquiqueit)

Pictures (1 Images total)

Iquiqueit
Views (File:
1654017371
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Iquiqueit
gelber, tafeliger Iquiqueit, Aguas Blancas Mine, Antofagasta, Chile; BB ~ 0,5mm, analysiert mittels REM-EDX
Copyright: Joy Desor; Contribution: openpit
Location: Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Antofagasta/Mina Aguas Blancas
Mineral: Iquiqueite
Image: 1654017371
License: Usage for Mineralienatlas project only
Iquiqueit  E
Analysed with energy dispersive X-ray spectroscopy EDX

gelber, tafeliger Iquiqueit, Aguas Blancas Mine, Antofagasta, Chile; BB 0,5mm, analysiert mittels REM-EDX
Copyright: Joy Desor
Contribution: openpit 2022-05-31
Locality: Mina Aguas Blancas / Antofagasta / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Hardness (Mohs) 2
Solubility + kaltes H2O
Crystal System trigonal, P31c

Chemism

Chemical formula

K3Na4Mg(Cr6+O4)B24O39(OH)·12H2O

Chemical composition

Chrom, Magnesium, Natrium, Bor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 1466.2027858 u; Number of atoms in the formula: 114

Info

Empirical formula:

K3Na4Mg(CrO4)B24O39(OH)·12H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.72

25

21.93

1.0079470

25.1986750
Boron

B

17.70

24

21.05

10.8117000

259.4808000
Oxygen

O

61.11

56

49.12

15.9994300

895.9680800
Sodium

Na

6.27

4

3.51

22.9897702

91.9590808
Magnesium

Mg

1.66

1

0.88

24.3050600

24.3050600
Potassium

K

8.00

3

2.63

39.0983100

117.2949300
Chromium

Cr

3.55

1

0.88

51.9961600

51.9961600

Strunz 9th edition incl. updates

6.HA.20

6: Borate
H: Unklassifizierte Borate
A: Untergruppe nicht spezifiziert
20:Iquiqueit-Gruppe

Lapis Classification

VI/F.03-010

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
F: Chromate [CrO4] 2-

Classification by Hölzel

6.FC.580

6: Borates
F: Hexaborates
C: Phyllohexaborates
5: Unclassified

Dana 8th edition

27.01.08.01

27: Compound Borates
01: Compound Borates

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.055
Birefringence chart\! Iquiqueite title=Birefringence chart Iquiqueite

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

1.447

RI value γ / ε

1.502

Ri mean

1.465

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

159

Space Group

P31c

Cell parameters a (Å)

11.637

Cell parameters b (Å)

-

Cell parameters c (Å)

30.158

Cell parameters a/b or c/a

2.592

Cell parameters c/b

-

Z

3

Volumne (ų)

3536.839

X-Ray Powder Diffraction

10.11(80),
9.58(70),
8.39(70),
6.04(80),
3.02(100),
2.910(80),
2.888(80),
2.856(100)
XRD chart Iquiqueite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.05 (gemessen)

2.065 ( ρ calc. Mineralienatlas )

Instability

+ kaltes H2O

(Co-)Type locality

(Co-)Type locality

Chile/Tarapacá, Region (I. Region)/Iquique, Provinz/Zapiga

Preface

Author (Name, Year)

Ericksen & Mrose & Marinenko & McGee, 1986

References

American Mineralogist 71 (1986), 830

Other languages

German

Iquiqueit

French

Iquiqueite

English

Iquiqueite

Spanish

Iquiqueíta

Russian

Икикеит

CNMNC (IMA)-Number

IMA 1984-019

CNMNC symbol

Symbol

Iqu