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Leightonite

Pictures (4 Images total)

Leightonit
Views (Image: 1215638740): 2068, Rating: 8.14
Leightonit

Bildbreite: 7 mm; Fundort: Mina Salvadora, Caracoles, Sierra Gorda, Tocopilla-Provinz, Antofagasta, Chile

Copyright: Leonardus
Contribution: slugslayer 2008-07-09
Locality: Mina Salvadora / Caracoles / Sierra Gorda District / Tocopilla, Provinz / Antofagasta, Region (II. Region) / Chile
Leightonit-xx
Views (Image: 1327419686): 1149
Leightonit-xx

grüne Leightonit-xx. Fundort: Mina Chuqui, Chuquicamata, Calama, Chile (TL). Stück 1,8 cm.

Collection: Yi Sun
Copyright: Yi Sun
Contribution: sun-mineral 2012-01-24
Locality: Chuquicamata Mine / Chuquicamata District / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Leightonit
Views (Image: 1312660707): 817
Leightonit

Größe: 11,5 x 7,5 cm; Fundort: Chuquicamata Mine, Calama, Provinz Antofagasta, II. Region, Chile

Collection: Rick Smith
Copyright: Rock Currier
Contribution: slugslayer 2011-08-06
Locality: Chuquicamata Mine / Chuquicamata District / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Leightonit
Views (Image: 1546856060): 191
Leightonit

Leightonit; Chuquicamata Mine,Chile; BB: 6 cm

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2019-01-07
Locality: Chuquicamata Mine / Chuquicamata District / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Color blau grün, hellblau
Streak color weiß
Hardness (Mohs) 3
Solubility +++ H2O
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

K2Ca2Cu(SO4)4·2H2O

Chem­ical com­po­si­tion

Calcium, Kupfer, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 642.183248 u; Number of atoms in the formula: 31

Info

Empirical formula:

K2Ca2Cu(SO4)4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.63

4

12.90

1.0079470

4.0317880

Oxygen

O

44.85

18

58.06

15.9994300

287.9897400

Sulfur

S

19.97

4

12.90

32.0655000

128.2620000

Potassium

K

12.18

2

6.45

39.0983100

78.1966200

Calcium

Ca

12.48

2

6.45

40.0784000

80.1568000

Copper

Cu

9.90

1

3.23

63.5463000

63.5463000

Anal­y­sis wt%

K2O : 13.93, Na2O : 0.56, CaO : 18.41, CuO : 11.97, SO3 : 49.33, H2O : 5.71 (Ref: Dana, 7th ed. 2)

Strunz 9th edi­tion incl. updates

7.CC.70

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
C: Mit mittelgroßen und großen [Kationen]
70:Leightonit-Gruppe

Lapis Clas­sifica­tion

VI/C.20-020

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
20: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.CD.810

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
D: Sulfates, C medium + large
8: Polyhalite-Group

Dana 8th edi­tion

29.04.05.02

29: Hydrated Acid and Sulfates
04: Hydrated Acid and Sulfates where (A+)2 Bn (XO4)p · x(H2O)

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

blau grün, hellblau

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.017

Birefringence chart\! Leightonite title=Birefringence chart Leightonite

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

1.578

RI value β

1.587

RI value γ / ε

1.595

Ri mean

1.587

2V angle

Biaxial (-) 86°c

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

11.654

Cell param­e­ters b (Å)

7.497

Cell param­e­ters c (Å)

10.097

Cell param­e­ters a/b or c/a

1.554

Cell param­e­ters c/b

1.347

Cell param­e­ters α

90°

Cell param­e­ters β

125°13°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

722.636

X-Ray Pow­der Diffrac­tion

3.18(60),
2.90(100),
2.51(10),
2.40(10),
2.22(20),
1.781(30),
1.461(10),
1.047(10)

XRD chart Leightonite

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

VHN (Hard­ness Vick­ers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.95

2.951 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

Preface

Author (Name, Year)

Palache, 1938

References

American Mineralogist 87 (2002), 721

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

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

7.CC.70

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

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

VI/C.20-010

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

VI/C.20-020

Görgeyite

K2Ca5(SO4)6·H2O

monoklin : 2/m : C2/c

VI/C.20-030

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

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

7.CD.800

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

7.CD.810

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

7.CD.850

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

Hydroglauberite

Na4Ca(SO4)3·2H2O

29.04.01.01

Eugsterite

Na4Ca(SO4)3·2H2O

29.04.02.01

Löweite

Na12Mg7(SO4)13·15H2O

trigonal : 3 : R3

29.04.03.01

Ferrinatrite

Na3Fe(SO4)3·3H2O

trigonal : 3 : P3

29.04.04.01

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

29.04.05.01

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

29.04.05.02

Metavoltine

K2Na6Fe2+Fe63+(SO4)12O2·18 H2O

trigonal : 3 : P3

29.04.06.01

Görgeyite

K2Ca5(SO4)6·H2O

monoklin : 2/m : C2/c

29.04.07.01

Other languages

German

Leightonit

Spanish

Leightonita

French

Leightonite

English

Leightonite

Russian

Лейтонит

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