Synthesis and ferroelectric properties of rare earth compounds with tungsten bronze-type structure

2011 ◽  
Vol 129 (3) ◽  
pp. 673-677 ◽  
Author(s):  
M. Bouziane ◽  
M. Taibi ◽  
A. Boukhari
Keyword(s):  
Rare Earth ◽  
Ferroelectric Properties ◽  
Tungsten Bronze ◽  
Type Structure ◽  
Rare Earth Compounds

scholarly journals Intermetallic REPtZn Compounds with TiNiSi-type Structure

2011 ◽  
Vol 66 (7) ◽  
pp. 671-676 ◽  
Author(s):  
Trinath Mishra ◽  
Rainer Pöttgen
Keyword(s):  
Rare Earth ◽  
Single Crystal ◽  
Coordination Number ◽  
High Frequency ◽  
Three Dimensional ◽  
Type Structure ◽  
Rare Earth Compounds ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
X Ray

The equiatomic rare earth compounds REPtZn (RE = Y, Pr, Nd, Gd-Tm) were synthesized from the elements in sealed tantalum tubes by high-frequency melting at 1500 K followed by annealing at 1120 K and quenching. The samples were characterized by powder X-ray diffraction. The structures of four crystals were refined from single-crystal diffractometer data: TiNiSi type, Pnma, a = 707.1(1), b = 430.0(1), c = 812.4(1) pm, wR2 = 0.066, 602 F2, 21 variables for PrPt1.056Zn0.944; a = 695.2(1), b = 419.9(1), c = 804.8(1) pm, wR2 = 0.041, 522 F2, 21 variables for GdPt0.941Zn1.059; a = 688.2(1), b = 408.1(1), c = 812.5(1) pm, wR2 = 0.041, 497 F2, 22 variables for HoPt1.055Zn0.945; a = 686.9(1), b = 407.8(1), c = 810.4(1) pm, wR2 = 0.061, 779 F2, 20 variables for ErPtZn. The single-crystal data indicate small homogeneity ranges REPt1±xZn1±x. The platinum and zinc atoms build up three-dimensional [PtZn] networks (265 - 269 pm Pt-Zn in ErPtZn) in which the erbium atoms fill cages with coordination number 16 (6 Pt + 6 Zn + 4 Er). Bonding of the erbium atoms to the [PtZn] network proceeds via shorter RE-Pt distances, i. e. 288 - 293 pm in ErPtZn.

Alkali-rare earth niobates with the tungsten bronze-type structure

1968 ◽  
Vol 3 (10) ◽  
pp. 831-842 ◽  
Author(s):  
B.A. Scott ◽  
E.A. Giess ◽  
G. Burns ◽  
D.F. O'Kane
Keyword(s):  
Rare Earth ◽  
Tungsten Bronze ◽  
Type Structure

Nitrogenation of the RFe10Mo2 (R = rare earth) compounds with ThMn12 type structure

1991 ◽  
Vol 78 (8) ◽  
pp. 681-684 ◽  
Author(s):  
M. Anagnostou ◽  
C. Christides ◽  
D. Niarchos
Keyword(s):  
Rare Earth ◽  
Type Structure ◽  
Rare Earth Compounds

Piezoelectric and ferroelectric properties of rare-earth modified filled tungsten bronze barium silver niobate ceramics

1994 ◽  
Vol 154 (1) ◽  
pp. 195-200 ◽  
Author(s):  
K. Sambasiva Rao ◽  
C. Satyanarayana ◽  
A. V. Prasada Rao ◽  
A. I. Robin ◽  
R. P. Tandon
Keyword(s):  
Rare Earth ◽  
Ferroelectric Properties ◽  
Tungsten Bronze

Rare‐Earth Compounds with the Th3P4‐Type Structure

1966 ◽  
Vol 37 (3) ◽  
pp. 1433-1435 ◽  
Author(s):  
F. Holtzberg ◽  
S. Methfessel
Keyword(s):  
Rare Earth ◽  
Type Structure ◽  
Rare Earth Compounds
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