Der Chromat-Nosean Na8[Al6Si6O24](CrO4) — ein zeolithisches Gelbpigment?Professor Welf Bronger zum 70.Geburtstag gewidmet

Autor:	Jens Kemper, Peter Köhl, Franz Hund, Dirk Reinen
Rok vydání:	2002
Předmět:	Inorganic Chemistry Oxide ceramics chemistry.chemical_compound Crystallography chemistry Chromate conversion coating Inorganic chemistry Sodalite engineering Nosean engineering.material
Zdroj:	Zeitschrift für anorganische und allgemeine Chemie. 628:1457
ISSN:	1521-3749 0044-2313
DOI:	10.1002/1521-3749(200207)628:7<1457::aid-zaac1457>3.0.co;2-o
Popis:	A Chromate(VI) Oxide Ceramics Na8[Al6Si6O24](CrO4) with Zeolitic Nosean Structure and Pigment Properties The cages of the zeolitic sodalite lattice can be occupied by half by the tetrahedral CrO42— group, yielding a thermally stable, intense lemon-yellow pigment, in which the colour centres are shielded completely from the atmosphere. The analyses yielded compositions Na8[Al6+2δSi6—2δO24](CrO4)1—δ with a small surplus of Al3+ and a CrO42— deficiency (δ ≅ 0.15).
Databáze:	OpenAIRE
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