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Unnamed (Partially dehydrated Arsenuranospathite)

Collectors Summary

Crystal System tetragonal,

Chemism

Chem­ical formula

Al(UO2)2(AsO4)2F·~10H2O

Addi­tional chem. informa­tion

Der F-Gehalt ist leicht variabel (Kolitsch et al., 2019).

Chem­ical com­po­si­tion

Aluminium, Arsen, Fluor, Sauerstoff, Uran, Wasserstoff

Unit weight: 881.88945545 u; Number of atoms in the formula: 21

Info

Empirical formula:

Al(UO2)2(AsO4)2F·=10H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.23

2

9.52

1.0079470

2.0158940
Oxygen

O

23.58

13

61.90

15.9994300

207.9925900
Fluorine

F

2.15

1

4.76

18.9984033

18.9984033
Aluminium

Al

3.06

1

4.76

26.9815382

26.9815382
Arsenic

As

16.99

2

9.52

74.9216020

149.8432040
Uranium

U

53.98

2

9.52

238.0289130

476.0578260

Crystallography

Crystal Sys­tem

tetragonal

Cell param­e­ters a (Å)

7.15

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

20.52

Cell param­e­ters a/b or c/a

2.87

Cell param­e­ters c/b

-

Volumne (ų)

1049.034

Kristall struc­ture

Kristallsystem ungewiss. Pseudo(?)tetragonal. Kristallsystem und Raumgruppe unbekannt. Elementarzellendaten von Walenta (1978). Kolitsch et al. (2019) geben a ~ 7,12, c ~ 20,46 Å an, mit einer Superzelle ~ 7,14, c ~ 41,0 Å.

References

Theye, T., Walenta, K., Markl, G. - The chemical composition of uranospathite, arsenuranospathite, and associated minerals revisited: the peculiarity of fluorine incorporation in autunite group minerals. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry 193 (2016), 59-68.

Kolitsch, U., Bayerl, R. and Topa, D. - Neufunde aus der Grube Clara im mittleren Schwarzwald (V). Mineralien-Welt 30 (3) (2019), 12-27.

Other languages

German

Unbenamt (partiell dehydrirter Arsenuranospathit)

English

Unnamed (Partially dehydrated Arsenuranospathite)

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