Name: X-ray crystallography of krinovite
Creator: Stefano Merlino
Keywords: 01 natural sciences, 0104 chemical sciences, 0105 earth and related environmental sciences

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 1972 English Publisher:Walter de Gruyter GmbHJournal:Zeitschrift für Kristallographie, volume 136, pages 81-88 (issn: 0044-2968,

Authors: Stefano Merlino;

doi: 10.1524/zkri.1972.136.1-2.81 , 10.1524/zkri.1972.136.16.81

X-ray crystallography of krinovite

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Abstract

The unit cell of the meteoritic mineral krinovite, NaMg2CrSia01o, is triclinic with a = 10.22, b = 10.67, c = 8.80 A, IX = 10508', {l =. 960 36', y = 12501'. The monoclinic unit cell given by OLSEN and FUCHS is one of the possible pseudomonoclinic cells. Krinovite is polysynthetically twinned with the b axis of the pseudomonoclinic cell as twin axis. The close relationships among krinovite, aenigmatite and rhonite are shown. The crystal structure of krinovite is suggested and the crystallochemical formula NaVIII2MgVI4CrVI(CrVl)02Sis018 is derived.

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University of Pisa
Italy

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