1980/06/01 by L. Fanfani, G. Giuseppetti, C. Tadini +1
Environmental Science · Materials Science · #Chemical Synthesis and Characterization #Clay minerals and soil interactions #Crystal Structures and Properties
paper · doi:10.1180/minmag.1980.043.330.08
crossref issued 1980/06/01 · crossref published 1980/06/01 · crossref published-print 1980/06/01 · openalex publication_date 1980/06/01 · crossref created 2006/12/08 · crossref published-online 2018/07/05 · crossref deposited 2021/02/05 · openalex created_date 2025/10/10 · crossref indexed 2026/07/30 · openalex updated_date 2026/07/30
Summary The crystal structure of synthetic kogarkoite has been determined from X-ray data collected on an automatic diffractometer. The refinement was performed by a least-squares method employing anisotropic thermal parameters. The 3157 reflections with I > 3 σ(I) converged to a conventional R value of 0.033. The cell content is 12 Na 3 SO 4 F, the space-group P 2 1 / m , a = 18.074, b = 6.958, c = 11.443 Å, β = 107.71°. Kogarkoite presents a marked trigonal subcell with c ′ corresponding to [102] of the monoclinic cell. The tridimensional framework can be considered built up by nine differently stacked layers of Na atoms approximately perpendicular to the c ′ axis (five sheets are present in galeite, six in sulphohalite, and seven in schairerite). The very close structural relationships between these minerals are discussed.