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Leószilárdite

Pictures (2 Images total)

Leószilárdite
Views (File:
1475002231
): 625
Leószilárdite
Pale yellow masses of thin platy leószilárdite on andersonite, with malachite and white spheres of an unidentified Mg-carbonate. Field of view: 1.9 mm;
Copyright: Travis Olds; Contribution: Stefan
Location: USA/Utah/San Juan Co./White Canyon District/Red Canyon/Blue Lizard Mine
Mineral: Leószilárdite
Image: 1475002231
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Leószilárdite

Pale yellow masses of thin platy leószilárdite on andersonite, with malachite and white spheres of an unidentified Mg-carbonate. Field of view: 1.9 mm;
Copyright: Travis Olds
Contribution: Stefan 2016-09-27
Locality: Blue Lizard Mine / Red Canyon / White Canyon District / San Juan Co. / Utah / USA
Leószilárdite
Views (File:
1475002205
): 506
Leószilárdite
Pale yellow crystals of leószilárdite (IMA2015-128) on a bed of andersonite from the Markey Mine. It is the first Na+Mg uranyl carbonate. Field of view: 1.5 mm;
Copyright: Travis Olds; Contribution: Stefan
Location: USA/Utah/San Juan Co./White Canyon District/Red Canyon/Markey Mine
Mineral: Leószilárdite
Image: 1475002205
License: Usage for Mineralienatlas project only
Leószilárdite

Pale yellow crystals of leószilárdite (IMA2015-128) on a bed of andersonite from the Markey Mine. It is the first Na+Mg uranyl carbonate. Field of view: 1.5 mm;
Copyright: Travis Olds
Contribution: Stefan 2016-09-27
Locality: Markey Mine / Red Canyon / White Canyon District / San Juan Co. / Utah / USA

Collectors Summary

Color blass gelb
Streak color weiß
Hardness (Mohs) 2
Cleavages vollkommen {001}
Fracture uneben
Solubility leicht löslich bei Raumtemperatur in H2O
Crystal System monoklin, C2/m
Morphology Das neue Mineral tritt als Aggregate von hellgelben auf {001} abgeflachten Kristallen auf welche entlang [010] gestreckt sind. Sie erreichen individuelle Längen bis zu 0,2 mm. Häufiger kommt es als blassgelbe perlglänzende Massen bis 2 mm, bestehend aus sehr kleinen Plättchen, vor. Leószilárdit zeigt die Formen: {110}, {001}, {100}, {101}, {-101}

Chemism

Chemical formula

Na6Mg(UO2)2(CO3)6·6H2O

Empirical formula (analysis)

Na5.60Mg0.90U2O28C6H12.60

Chemical composition

Magnesium, Natrium, Kohlenstoff, Sauerstoff, Uran, Wasserstoff

Unit weight: 1159.42394532 u; Number of atoms in the formula: 55.1

Info

Empirical formula:

Na5.60Mg0.90U2O28C6H12.60

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.10

12.6

22.87

1.0079470

12.7001322
Carbon

C

6.22

6

10.89

12.0107800

72.0646800
Oxygen

O

38.64

28

50.82

15.9994300

447.9840400
Sodium

Na

11.10

5.6

10.16

22.9897702

128.7427131
Magnesium

Mg

1.89

0.9

1.63

24.3050600

21.8745540
Uranium

U

41.06

2

3.63

238.0289130

476.0578260

Analysis wt%

Na2O : 14.54, MgO : 3.05, UO3 : 47.95, CO2 : 22.13, H2O : 9.51, Total : 97.18 wt%

Strunz 9th edition incl. updates

5.EG.

5: Carbonate (Carbonate, Nitrate)
E: Uranylcarbonate
G: Mit SO4 oder SiO4

Lapis Classification

V/F.02-025

V: NITRATE, CARBONATE UND BORATE
F: Uranylcarbonate [UO2] 2+ – [CO3] 2-

IMA status

anerkannt - CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.

Mineral status

anerkanntes Mineral

Optical Properties

Color

blass gelb

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

RI value α / ω / n

α = 1.504(1)

RI value β

β = 1.597(1)

RI value γ / ε

γ = 1.628(1)

2V angle

Biaxial (-) 57(1)° (gemessen) 57.1° (berechnet)

Dispersion

r > v, gering

Absorption

X < Y ≈ Z

Pleochroism

X = farblos, Y und Z = hell gelb

Optical Data Luminescence

Luminescence

grüne Floreszenz unter langwelligem und kurzwelligem UV.

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

11.609(2)

Cell parameters b (Å)

6.784(1)

Cell parameters c (Å)

15.106(3)

Cell parameters a/b or c/a

1.711

Cell parameters c/b

2.227

Cell parameters α

90°

Cell parameters β

91.378(3)°

Cell parameters γ

90°

Z

2

Volume (ų)

1189.336

Crystal structure

Neuer Strukturtyp; Struktur bestimmt

X-Ray Powder Diffraction

7.59(36), 5.46(100), 4.64(28), 3.82(30), 3.383(33), 3.105(25), 2.864(31), 2.028(28)
XRD chart Leószilárdite

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

Morphology

Das neue Mineral tritt als Aggregate von hellgelben auf {001} abgeflachten Kristallen auf welche entlang [010] gestreckt sind. Sie erreichen individuelle Längen bis zu 0,2 mm. Häufiger kommt es als blassgelbe perlglänzende Massen bis 2 mm, bestehend aus sehr kleinen Plättchen, vor.

Leószilárdit zeigt die Formen: {110}, {001}, {100}, {101}, {-101}

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

Density (g/cm³)

3.237 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

uneben

Tenacity

spröde

Instability

leicht löslich bei Raumtemperatur in H2O

(Co-)Type locality

(Co-)Type locality

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

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

Type material

Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA

Collection number of type material

65645

Paragenesis of type material

Andersonit, Natrozippeit, Gips, Anhydrit, und wahrscheinlich Hydromagnesit zusammen mit anderen Sekundär-Uran-Mineralien Bayleyit, Čejkait und Johannit

Preface

Name from
Leo Szilard
Leo Szilard
U.S. Department of Energy; ungarisch-amerikanischen Physiker, Erfinder und Biologe Dr. Leó Szilárd (1898-1964)
Copyright: U.S. Department of Energy; Contribution: Stefan
Image: 1474988627
License: Public Domain

Der Name des Minerals ehrt den ungarisch-amerikanischen Physiker, Erfinder und Biologe Dr. Leó Szilárd (1898-1964).

Author (Name, Year)

Travis A. Olds, Luke Sadergaski, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Ian M. Steele und Joe Marty (2016)

References

Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C., Steele, I.M. und Marty, J. (2016) Leoszilardite, IMA 2015-128. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.

IMA 2015-128 - Mineralogical Magazine, 2016, Vol. 80(5), pp. 915-922 [Mineral umbenannt]

Olds, Travis A.; Sadergaski, Luke R.; Plášil, Jakub; Kampf, Anthony R.; Burns, Peter C.; Steele, Ian M.; Marty, Joe; Carlson, Shawn; Mills, Owen P - Leószilárdite, the first Na,Mg-containing uranyl carbonate from the Markey Mine, San Juan County, Utah, USA - Mineralogical Magazine, Appeared or available online: 26. September 2016

Other languages

German

Leószilárdit

English

Leószilárdite

Russian

Леосилардит

CNMNC (IMA)-Number

IMA 2015-128

CNMNC symbol

Symbol

Lsz

Locations with GPS information

IDs

GUSID (Global unique identifier short form) APyaiI_i5Uy4sYeT3E3y0Q
GUID (Global unique identifier) 889AFC00-E28F-4CE5-B8B1-8793DC4DF2D1
Database ID 8131