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Der Chromat‐Nosean Na 8 [Al 6 Si 6 O 24 ](CrO 4 ) — ein zeolithisches Gelbpigment?
Author(s) -
Hund Franz,
Köhl Peter,
Kemper Jens,
Reinen Dirk
Publication year - 2002
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200207)628:7<1457::aid-zaac1457>3.0.co;2-o
Subject(s) - sodalite , pigment , chemistry , mineralogy , nuclear chemistry , zeolite , biochemistry , organic chemistry , catalysis
A Chromate(VI) Oxide Ceramics Na 8 [Al 6 Si 6 O 24 ](CrO 4 ) with Zeolitic Nosean Structure and Pigment Properties The cages of the zeolitic sodalite lattice can be occupied by half by the tetrahedral CrO 4 2— group, yielding a thermally stable, intense lemon‐yellow pigment, in which the colour centres are shielded completely from the atmosphere. The analyses yielded compositions Na 8 [Al 6+2δ Si 6—2δ O 24 ](CrO 4 ) 1—δ with a small surplus of Al 3+ and a CrO 4 2— deficiency (δ ≅ 0.15).