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Structural characterization of Mg3MnH∼6—a new high-pressure phase synthesized in a multi-anvil cell at 6 GPa

✍ Scribed by Helen Blomqvist; Ewa Rönnebro; Daisuke Kyoi; Tetsuo Sakai; Dag Noréus

Book ID
117621740
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
411 KB
Volume
358
Category
Article
ISSN
0925-8388

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Effect of hydrostatic pressure up to 6 GPa on the crystal structures of ammonium and sodium hexafluorosilicates, (NH4)2SiF6 and Na2SiF6; a phase transition in (NH4)2SiF6 at 0.2–0.3 GPa
✍ Boldyreva, Elena V.; Shakhtshneider, Tatyana P.; Sowa, Heidrun; Ahsbahs, Hans 📂 Article 📅 2007 🏛 Oldenbourg Wissenschaftsverlag 🌐 English ⚖ 461 KB

An __in situ__ X-ray powder diffraction study has shown the cubic modification of (NH~4~)~2~SiF~6~ (cryptohalite, space group __Fm__¯3__m__) at 0.2–0.3 GPa to transform irreversibly into the trigonal bararite, space group __P__¯3__m__1. The anisotropy of lattice strain in the high-pressure phase of