Crystal data for two new lanthanide acid iodates: Pr(IO 3 ) 3 .HIO 3  and 3La(IO 3 ) 3 .JIO 3 .7H 2 O | Zendy

Abrahams S. C. | Zendy; Bernstein J. L. | Zendy; Shiever J. W. | Zendy; Nassau K. | Zendy

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Crystal data for two new lanthanide acid iodates: Pr(IO 3 ) 3 .HIO 3 and 3La(IO 3 ) 3 .JIO 3 .7H 2 O

Author(s) -

Abrahams S. C.,

Bernstein J. L.,

Shiever J. W.,

Nassau K.

Publication year - 1976

Publication title -

journal of applied crystallography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.429

H-Index - 162

ISSN - 1600-5767

DOI - 10.1107/s0021889876011515

Subject(s) - monoclinic crystal system , orthorhombic crystal system , crystallography , lanthanide , chemical formula , lanthanide contraction , materials science , space group , mineralogy , x ray crystallography , crystal structure , chemistry , diffraction , physics , ion , optics , organic chemistry

Method of growth and chemical characterization of single crystals of Pr(IO 3 ) 3 . HIO 3 and 3La(IO 3 ) 3 . HIO 3 .7H 2 O are given together with the powder data. Pr(IO 3 ) 3 .HIO 3 is monoclinic, a = 14.237±0.006, b = 7.578± 0.003, c = 10.616±0.005 Å, β = 110.48±0.04° at 298 K with space group P 2 1 / a and four formulas perunit cell. 3La(IO 3 ) 3 .HIO 3 .7H 2 O is orthorhombic, a = 13.18008±0.00010, b = 21.72076±0.00010, c = 12.15514±0.00018 Å at 298 K with space group Aba 2 and four formulas per unit cell. The hydrated La acid salt generates second harmonics: the pyroelectric coefficient p 3 = 2.1 x 10 −5 Cm −2 deg −1 . Mo K radiation produces a bright orange coloration.

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