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- W1986770616 abstract "The crystal structure of LiCrGeO4 has been refined using powder neutron diffraction data at 300 and 1.2 K. This compound has a spine) structure with tetrahedral sites mainly occupied by Li+ ions: IVLi1–x-yIVGexIVCryVILix+yVIGe1–xVICr1–yO4 with x+y– <0.05.Above 130 K, the magnetic susceptibility of LiCrGeO4 obeys the Curie–Weiss law with a negative paramagnetic Curie temperature θp=–284 K (antiferromagnetic interactions between Cr3+ ions in octahedral coordination). No long-range magnetic order is observed at lower temperatures, a result which can be explained by a Cr/Ge disorder in octahedral sites and frustration effects. Crystallochemical considerations about IVGeVILiVIInO4, of olivine-type structure, and IVLiVICrVIGeO4 of spine)-type structure, were made considering the cationic radii; the olivine-type structure is stabilized by big cations (ca. 0.8 A) in octahedral sites and small cations (ca. 0.4 A) in tetrahedral sites. Cations with intermediate size (ca. 0.6 A) in tetrahedral and octahedral sites stabilize the spine)-type structure." @default.
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- W1986770616 date "1993-01-01" @default.
- W1986770616 modified "2023-09-26" @default.
- W1986770616 title "Structural and magnetic properties of LiCrGeO4" @default.
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- W1986770616 doi "https://doi.org/10.1039/jm9930300623" @default.
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