Vorlanite, (CaU6+)O4, from Jabel Harmun, Palestinian Autonomy, Israel

Galuskin, Evgeny V.; Kusz, Joachim; Armbruster, Thomas Michael; Galuskina, Irina O.; Marzec, Katarzyna; Vapnik, Yevgeny; Murashko, Mikhail (2013). Vorlanite, (CaU6+)O4, from Jabel Harmun, Palestinian Autonomy, Israel. American mineralogist, 98(11-12), pp. 1938-1942. Mineralogical Society of America 10.2138/am.2013.4548

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Vorlanite (CaU6+)O4 Fm3̄m, a = 5.3647(9) Å, V = 154.40(4) Å3, Z = 2 was found in larnite pyrometamorphic rocks of the Hatrurim formation at the Jabel Harmun locality, Judean Desert, Palestinian Autonomy. Vorlanite crystals from these larnite rocks are dark-gray with greenish hue in transmitted light. This color in transmitted light is in contrast to dark-red vorlanite Fm3̄m, a = 5.3813(2) Å, V = 155.834(10)Å3, Z = 2 from the type locality Upper Chegem caldera, Northern Caucasus. Heating above 750 °C of dark-gray vorlanite from the Jabel Harmun, as well as dark-red vorlanite from Caucasus, led to formation of yellow trigonal uranate CaUO4. The unusual color of vorlanite from Jabel Harmun is assumed to be related to small impurities of tetravalent uranium.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences > Mineralogical Crystallography (discontinued)
08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Armbruster, Thomas Michael

Subjects:

500 Science > 540 Chemistry
500 Science > 550 Earth sciences & geology

ISSN:

0003-004X

Publisher:

Mineralogical Society of America

Language:

English

Submitter:

Frank Gfeller

Date Deposited:

08 Aug 2014 16:35

Last Modified:

22 Dec 2015 16:18

Publisher DOI:

10.2138/am.2013.4548

URI:

https://boris.unibe.ch/id/eprint/45480

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