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The Structure and Properties of β-La3RuO7: A New Structure Type with Isolated RuO6 Octahedra

✍ Scribed by P. Khalifah; D.M. Ho; Q. Huang; R.J. Cava

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
264 KB
Volume
165
Category
Article
ISSN
0022-4596

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✦ Synopsis

A second lanthanum ruthenium oxide with the formula La 3 RuO 7 is reported. This compound, -La 3 RuO 7 , crystallizes in the P2 1 /c space group with a unit cell of a ‫؍‬ 8.8388(3) A > , b ‫؍‬ 5.6960(1) A > , c ‫؍‬ 12.5830(3) A > , and ‫؍‬ 104.729(1)3, as re-5ned from powder neutron di4raction data. The two major structural motifs in this structure are isolated RuO 6 octahedra and edge-sharing chains of OLa 4 tetrahedra. Magnetic susceptibility measurements show this compound to have a magnetic moment of eff ‫؍‬ 3.92 B and a Weiss constant of ‫؍‬ ؊ 70 K.

2002 Elsevier Science (USA)

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La7Ru3O18 and La4.87Ru2O12: Geometric Frustration in Two Closely Related Structures with Isolated RuO6 Octahedra
✍ P. Khalifah; Q. Huang; D.M. Ho; H.W. Zandbergen; R.J. Cava 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 487 KB

The crystal structures of La 7 Ru 3 O 18 and La 4.87 Ru 2 O 12 have been solved from powder neutron di4raction data (R p ‫؍‬ 0.032) and single-crystal X-ray di4raction data (R w ‫؍‬ 0.070 for all 3125 re6ections), respectively. Although these compounds are both the 5rst example of their structure ty