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Geschieberite

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Geschieberit
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Geschieberit

Bildbreite: 4 mm, Fundort: Geschieber Gang, Einigkeit (Svornost), St. Joachimsthal (Jáchymov), Region Karlsbad (Karlovarsky kraj), Tschechien

Copyright: Pavel Škácha, Czechmin
Contribution: thdun5 2015-10-08
Locality: Geschieber-Gang / Einigkeit (Svornost) / St. Joachimsthal (Jáchymov) / Karlsbad (Karlovy Vary), Bezirk / Karlsbad, Region (Karlovarsky kraj) / Tschechien

Collectors Summary

Color leuchtend grün
Streak color grünlich weiß
Lustre Glasglanz
Hardness (Mohs) ~ 2
Cleavages vollkommen {100}
Fracture uneben
Solubility schwach löslich in H2O
Crystal System orthorhombisch, Pna21

Chemism

Chem­ical formula

K2(UO2)(SO4)2·2H2O

Chem­ical com­po­si­tion

Kalium, Sauerstoff, Schwefel, Uran, Wasserstoff

Unit weight: 576.381481 u; Number of atoms in the formula: 21

Info

Empirical formula:

K2(UO2)(SO4)2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.70

4

19.05

1.0079470

4.0317880

Oxygen

O

33.31

12

57.14

15.9994300

191.9931600

Sulfur

S

11.13

2

9.52

32.0655000

64.1310000

Potassium

K

13.57

2

9.52

39.0983100

78.1966200

Uranium

U

41.30

1

4.76

238.0289130

238.0289130

Anal­y­sis wt%

Na2O : 0.23, K2O : 14.29, MgO : 2.05, CaO : 0.06, UO3 : 49.51, SO3 : 27.74, H2O : 6.36 (structure), Total : 100.24 wt.%

Strunz 9th edi­tion incl. updates

7.EC.

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
E: Uranylsulfate
C: Mit mittelgroßen und großen [Kationen]

IMA sta­tus

anerkannt - CNMNC Newsletter No. 20, June 2014, page 555

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

leuchtend grün

Streak color

grünlich weiß

Diaphane­ity (Trans­parency)

durchscheinend, transparent

Lus­tre

Glasglanz

RI value β

1.596(2)

RI value γ / ε

1.634(4)

2V angle

Biaxial (-)

Ori­enta­tion

X = a

Optical Data Luminescence

Lumi­nes­cence

starke gelblichgrüne Fluoreszenz und KW und LW

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mm2

Space Group number

33

Space Group

Pna21

Cell param­e­ters a (Å)

13.7778(3)

Cell param­e­ters b (Å)

7.2709(4)

Cell param­e­ters c (Å)

11.5488(2)

Cell param­e­ters a/b or c/a

1.895

Cell param­e­ters c/b

1.588

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1156.924

Kristall struc­ture

Struktur bestimmt, bekannte synthetische Phase

X-Ray Pow­der Diffrac­tion

3.453(15), 3.174(24), 2.794(100), 2.744(88), 2.639(34), 2.514(25), 1.853(25), 1.750(22)

XRD chart Geschieberite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

~ 2

Density (g/cm³)

3.259 (berechnet)

3.309 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {100}

Frac­ture

uneben

Tenac­ity

spröde

Insta­bil­ity

schwach löslich in H2O

(Co-)Type locality

(Co-)Type locality

Tschechien/Karlsbad, Region (Karlovarsky kraj)/Karlsbad (Karlovy Vary), Bezirk/St. Joachimsthal (Jáchymov)/Einigkeit (Svornost)/Geschieber-Gang

Type mate­r­ial

Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia

Col­lec­tion number of type mate­r­ial

4537/1

Par­a­ge­n­e­sis of type mate­r­ial

Gips, Adolfpaterait, Mathesiusit, Svornostit

Preface

Name from

Der Name stammt von einer der wichtigesten Erzadern der Geschieber Erzader in Jáchymov ab.

Author (Name, Year)

Plášil, J., Hloušek, J., Kasatkin, A.V., Škoda, R., Novák, M., Čejka, J. (2014)

References

Plášil, J., Hloušek, J., Kasatkin, A.V., Škoda, R., Novák, M., Čejka, J. (2014): Geschieberite, IMA 2014-006. CNMNC Newsletter No. 20, June 2014, page 555; Mineralogical Magazine, 78, 549-558

Plášil, J., Hloušek, J., Kasatkin, A.V., Skoda, R., Novák, M., Čejka, J. (2015): Geschieberite, K2(UO2)(SO4)2(H2O)2, a new uranyl sulfate mineral from Jáchymov. Mineralogical Magazine, 79, 205-216.

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

Fermiite

Na4(UO2)(SO4)3·3H2O

orthorhombisch : mm2 : Pmn21

7.EC.

Bobcookite

NaAl(UO2)2(SO4)4·18H2O

triklin : 1 : P1

7.EC.

Feynmanite

Na(UO2)(SO4)(OH)·3.5H2O

monoklin : 2/m : P2/n

7.EC.

Meisserite

Na5(UO2)(SO4)3(SO3OH)(H2O)

triklin : 1 : P1

7.EC.

Běhounekite

U(SO4)2(H2O)4

orthorhombisch : mmm : Pnma

7.EC.

Klaprothite

Na6(UO2)(SO4)4·4H2O

monoklin : 2/m : P21/c

7.EC.

Ottohahnite

Na6(UO2)2(SO4)5(H2O)7·1.5H2O

triklin : 1 : P1

7.EC.

Péligotite

Na6(UO2)(SO4)4·4H2O

triklin : 1 : P1

7.EC.

Mathesiusite

K5(UO2)4(SO4)4(VO5)·4H2O

tetragonal : 4/m : P4/n

7.EC.

Navrotskyite

K2Na10(UO2)3(SO4)9·2H2O

orthorhombisch : mmm : Pbcm

7.EC.

Belakovskiite

Na7(UO2)(SO4)4(SO3OH)(H2O)3

triklin : 1 : P1

7.EC.

Bluelizardite

Na7(UO2)(SO4)4Cl(H2O)2

monoklin : 2/m : C2/c

7.EC.

Geschieberite

K2(UO2)(SO4)2·2H2O

orthorhombisch : mm2 : Pna21

7.EC.

Adolfpateraite

K(UO2)(SO4)(OH)(H2O)

monoklin : 2/m : P21/c

7.EC.

Plášilite

Na(UO2)(SO4)(OH)·2H2O

monoklin : 2/m : P21/c

7.EC.

Seaborgite

LiK2Na6(UO2)(SO4)5(SO3OH)(H2O)

triklin : 1 : P1

7.EC.

Wetherillite

Na2Mg(UO2)2(SO4)4·18H2O

monoklin : 2/m : P21/c

7.EC.

Oppenheimerite

Na2(UO2)(SO4)2·3H2O

triklin : 1 : P1

7.EC.

Alwilkinsite-(Y)

Y(UO2)3(SO4)2O(OH)3(H2O)7·7H2O

orthorhombisch : 222 : P212121

7.EC.

Ammoniomathesiusite

(NH4)5(UO2)4(SO4)4(VO5)·4H2O

tetragonal : 4/m : P4/n

7.EC.

Pseudomeisserite-(NH4)

(NH4)2Na4[(UO2)2(SO4)5]·4H2O

monoklin : 2/m : P21/c

7.EC.

Zippeite

K3(UO2)4(SO4)2O3(OH)·3H2O

monoklin : 2 : C2

7.EC.05

Redcanyonite

(NH4)2Mn[(UO2)4O4(SO4)2](H2O)4

monoklin : 2/m : C2/m

7.EC.05

Zinczippeite

Zn(UO2)2(SO4)O2·3.5H2O

monoklin : 2/m : C2/m

7.EC.05

Natrozippeite

Na5(UO2)8(SO4)4O5(OH)3·12H2O

monoklin : 2/m : P21/n

7.EC.05

Cobaltzippeite

Co(UO2)2(SO4)O2·3.5H2O

monoklin : 2/m : C2/m

7.EC.05

Nickelzippeite

Ni2(UO2)6(SO4)3(OH)10·16H2O

monoklin : 2/m : C2/m

7.EC.05

Pseudojohannite

Cu6.5(UO2)8O8(SO4)4(OH)5·25H2O

triklin : 1 : P1

7.EC.05

Ammoniozippeite

(NH4)2[(UO2)2(SO4)O2]·H2O

orthorhombisch : mmm : Ccmb

7.EC.05

Magnesiozippeite

Mg(UO2)2(SO4)O2·3.5H2O

monoklin : 2/m : C2/m

7.EC.05

Rabejacite

Ca2[(UO2)4O4(SO4)2](H2O)8

triklin : 1 : P1

7.EC.10

Sejkoraite-(Y)

Y2(UO2)8O6(SO4)4(OH)2·26H2O

triklin : 1 : P1

7.EC.15

Marécottite

Mg3[(UO2)4O3(OH)(SO4)2]2(H2O)28

triklin : 1 : P1

7.EC.15

Plavnoite

K0.8Mn0.6[(UO2)2O2(SO4)]·3.5H2O

monoklin : 2/m : C2/c

7.EC.20

Other languages

German

Geschieberit

English

Geschieberite

Russian

Гешиберит

IMA Number

IMA 2014-006

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