ChemInform Abstract: Solid Solutions RE16Rh11-xZx(RE: La, Ce, Pr, Nd, Sm; Z: Ga, Zn, Cd, In, Sn, Sb, Pb, Bi) - Centrosymmetric n = 2 Variants of Parthe′s Homologous Series A5n+6B3n+5.

ChemInform ◽  
2012 ◽  
Vol 43 (42) ◽  
pp. no-no
Author(s):  
Frank Tappe ◽  
Falko M. Schappacher ◽  
Thorsten Langer ◽  
Inga Schellenberg ◽  
Rainer Poettgen
Keyword(s):  
Solid Solutions ◽  
Homologous Series

Selectivity in the Photoproduct Ratios from Norrish II Reactions of a Homologous Series of 2-Alkanones in Their Melt and Solid Phases. Comparison with Other Environments

1993 ◽  
Vol 58 (1) ◽  
pp. 142-152 ◽  
Author(s):  
Richard G. Weiss ◽  
Sosale Chandrasekhar ◽  
Patricia M. Vilalta
Keyword(s):  
Solid Solutions ◽  
Homologous Series ◽  
Size And Shape ◽  
Solid Phases ◽  
Solvent Molecules

The product ratios from Norrish II reactions of 2-tridecanone, 2-tetradecanone, 2-pentadecanone, 2-hexadecanone, 2-heptadecanone, and 2-nonadecanone have been measured at low percents of conversion in the melt and solid phases. Although elimination/cyclization photoproduct ratios from the neat crystals are > 60 in optimal cases, the ratios of cyclobutanol diastereomers (cyclization products) remain near those observed from melt irradiations. From comparisons of the photoproduct selectivities in the neat solids and in their solid solutions, where the solvent molecules are similar in size and shape to the 2-alkanones, it is concluded that the crystalline lattices of some foreign hosts offer environments to the pre-product biradical intermediates, which are at least as restrictive as the environments of the solid 2-alkanones.

Solid Solutions RE16Rh11–xZx (RE = La, Ce, Pr, Nd, Sm; Z = Ga, Zn, Cd, In, Sn, Sb, Pb, Bi) – Centrosymmetric n = 2 Variants of Parthé’s Homologous Series A5n+6B3n+5

2012 ◽  
Vol 67 (6) ◽  
pp. 594-604 ◽  
Author(s):  
Frank Tappe ◽  
Falko M. Schappacher ◽  
Thorsten Langer ◽  
Inga Schellenberg ◽  
Rainer Pöttgen
Keyword(s):  
Single Crystal ◽  
Solid Solutions ◽  
Homologous Series ◽  
High Frequency ◽  
Structural Motif ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Subgroup Scheme ◽  
A Chain

Several samples of solid solutions RE16Rh11-xZx (RE = La, Ce, Pr, Nd, Sm; Z = Ga, Zn, Cd,In, Sn, Sb, Pb, Bi) were synthesized by high-frequency melting of the elements in sealed tantalum ampoules. The samples were characterized by powder X-ray diffraction, and the structures of eight compounds were refined on the basis of single-crystal X-ray diffractometer data. The compounds crystallize with a centrosymmetric variant (space group P4⁄mbm) of the Ca16Sb11 type (P4̄ 21m). The relation between both structure types is discussed on the basis of a group-subgroup scheme. Only for La16Rh8Sn3 we observed full rhodium-tin ordering. The striking structural motif is a chain of face-sharing square prisms (filled with tin) and anti-prisms (filled with rhodium). The La16Rh8Sn3 structure is closely related to the structure types W5Si3, Ca16Sb11, Y3Rh2, Sm26Co11Ga6, Pu31Pt20, and Yb36Sn23 and is the centrosymmetric n = 2 member of Parthé’s A5n+6B3n+5 series. 119Sn Mössbauer spectra resolved the two crystallographically independent tin sites of La16Rh8Sn3, while a Pr16Rh9Sb2 sample shows only a singlet in its 121Sb Mössbauer spectrum.

Optical vibration modes in Hg1-xZnxTe solid solutions near q=0

1989 ◽  
Vol 50 (21) ◽  
pp. 3223-3232 ◽  
Author(s):  
G. Le Bastard ◽  
R. Granger ◽  
S. Rolland ◽  
Y. Marqueton ◽  
R. Triboulet
Keyword(s):  
Solid Solutions ◽  
Vibration Modes ◽  
Optical Vibration

NOVEL SMECTIC POLYMORPHIC BEHAVIOUR IN HOMOLOGOUS SERIES OF MESOGENS

1975 ◽  
Vol 36 (C1) ◽  
pp. C1-365-C1-374 ◽  
Author(s):  
D. COATES ◽  
G. W. GRAY
Keyword(s):  
Homologous Series

Valence instabilities of Tm in its compounds and solid solutions

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-314-C5-320 ◽  
Author(s):  
F. Holtzberg ◽  
T. Penney ◽  
R. Tournier
Keyword(s):  
Solid Solutions
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