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A Molybdenyl Chloromonophosphate with an Intersecting Tunnel Structure: Ba3Li2Cl2(MoO)4(PO4)6

โœ Scribed by M.M Borel; A Leclaire; J Chardon; J Provost; B Raveau


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
603 KB
Volume
141
Category
Article
ISSN
0022-4596

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โœฆ Synopsis


A new molybdenyl chloromonophosphate, Ba 3 Li 2 Cl 2 (MoO) 4 (PO 4 ) 6 , has been synthesized. It crystallizes in the space group P2 1 2 1 2 1 , with a โ€ซุโ€ฌ 9.1768(4), b โ€ซุโ€ฌ 15.660(1), and c โ€ซุโ€ฌ 18.117(2) A s . This original pseudotetragonal structure forms an intersecting tunnel framework [Mo 4 P 6 O 28 ] built up from [Mo 2 P 2 O 12 ] layers interconnected through single PO 4 tetrahedra. The [Mo 2 P 2 O 12 ] layers derive from the perovskite structure by replacing one octahedron out of two by one PO 4 tetrahedron. The Li ุ‰ , Ba 2ุ‰ , and Cl\ species are distributed in the [100], [001], [201], and [201 ] tunnels forming intersecting rows. Two sorts of polyhedra are found for Li ุ‰ : LiO 3 Cl tetrahedra and LiO 3 triangular groups. The susceptibility measurements suggest a bidimensional antiferromagnetic behavior between 12 and 20 K, whereas a peak at 10 K is attributed to canting phenomena.


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