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Bobcookite

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Bobcookit
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Bobcookit

gelbgrüner Kristall von Bobcookit, Blue Lizard Mine, Red Canyon, san Juan Co., Utah, USA, BB 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-01-19
Locality: Blue Lizard Mine / Red Canyon / White Canyon District / San Juan Co. / Utah / USA

Collectors Summary

Color limettengrün, grüngelb
Streak color blass grünlichgelb
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages keine
Fracture muschelig
Solubility +++ kaltem H2O
Crystal System triklin, P1

Chemism

Chem­ical formula

NaAl(UO2)2(SO4)4·18H2O

Empir­ical formula (anal­y­sis)

Na0.97Al1.09(U1.02O2)2(S0.98O4)4(H2O)18

Chem­ical com­po­si­tion

Aluminium, Natrium, Sauerstoff, Schwefel, Uran, Wasserstoff

Unit weight: 1307.250128252 u; Number of atoms in the formula: 82.02

Info

Empirical formula:

Na0.97Al1.09(U1.02O2)2(S0.98O4)4(H2O)18

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.78

36

43.89

1.0079470

36.2860920

Oxygen

O

46.51

38

46.33

15.9994300

607.9783400

Sodium

Na

1.71

0.97

1.18

22.9897702

22.3000771

Aluminium

Al

2.25

1.09

1.33

26.9815382

29.4098766

Sulfur

S

9.62

3.92

4.78

32.0655000

125.6967600

Uranium

U

37.15

2.04

2.49

238.0289130

485.5789825

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. 21, August 2014, page 802

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

limettengrün, grüngelb

Streak color

blass grünlichgelb

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.035

Birefringence chart\! Bobcookite title=Birefringence chart Bobcookite

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

α = 1.501(1)

RI value β

β = 1.523(1)

RI value γ / ε

γ = 1.536(1)

Ri mean

1.52

2V angle

Biaxial (-) 78(1)° (gemessen) 74° (berechnet)

Dis­per­sion

moderat; r < v

Absorp­tion

X < Y < Z

Pleochro­ism

X farblos, Y sehr blass gelb-grün, Z blass gelb-grün

Optical Data Luminescence

Lumi­nes­cence

helle grünlichweiße Fluoreszenz

Color LW-UV (365nm)

 

grün

LW-UV Intensity

mittel

Color SW-UV (254nm)

 

grün

SW-UV Intensity

stark

Most Common Acti­vator

(UO2)2+ (Uranyl-Ion) spezifisch

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell param­e­ters a (Å)

7.7912(2)

Cell param­e­ters b (Å)

10.5491(3)

Cell param­e­ters c (Å)

11.2451(8)

Cell param­e­ters a/b or c/a

0.739

Cell param­e­ters c/b

1.066

Cell param­e­ters α

68.961(5)°

Cell param­e­ters β

70.909(5)°

Cell param­e­ters γ

87.139(6)º

Z

1

Volumne (ų)

812.788

Kristall struc­ture

Neuer Strukturtyp; Struktur bestimmt

X-Ray Pow­der Diffrac­tion

9.82(100), 7.14(99), 6.33(55), 5.99(39), 5.25(83), 3.563(52), 3.441(49), 3.082(57)

XRD chart Bobcookite

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

Physical Properties

Hard­ness (Mohs)

2.5

Density (g/cm³)

2.669 (berechnet)

2.671 ( ρ calc. Mineralienatlas )

Cleav­ages

keine

Frac­ture

muschelig

Tenac­ity

spröde

Insta­bil­ity

+++ kaltem H2O

Chem­ical Prop­er­ties and Tests

moderat hygroskopisch

(Co-)Type locality

(Co-)Type locality

USA/Utah/San Juan Co./White Canyon District/Red Canyon/Blue Lizard Mine

Type mate­r­ial

Natural History Museum of Los Angeles County, Los Angeles, USA

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

Col­lec­tion number of type mate­r­ial

Los Angeles: 64164

Moskau: 4560/1

Preface

Gen­er­a­tion con­di­tions

sekundäre Alterungsphase

Asso­cia­tions

Wetherillit, Boyleit, Chalkanthit, Dietrichit, Gyps Hexahydrit, Johannit, Pickeringit und Rozenit

Author (Name, Year)

Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. (2014)

References

Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. (2014) Bobcookite, IMA 2014-030. CNMNC Newsletter No. 21, August 2014, page 802; Mineralogical Magazine, 78, 797-804

Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. - Bobcookite, NaAl(UO2)2(SO4)4·18H2O and wetherillite, Na2Mg(UO2)2(SO4)4·18H2O, two new uranyl sulfate minerals from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 79 (2015), 695-714.

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

Bobcookit

English

Bobcookite

Russian

Бобкукит

IMA Number

IMA 2014-030

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

German pages

DeWikiPedia - search for: Bobcookit
Google-Bilder-Suche - search for: Bobcookit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Bobcookit

English pages

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

Russian pages

Webmineral.ru - search for: Бобкукит

Mineral Dealer

German pages

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Locations with GPS information