Author
P. Conflant
Bio: P. Conflant is an academic researcher. The author has contributed to research in topics: Solid solution & Polymorphism (materials science). The author has an hindex of 1, co-authored 2 publications receiving 3 citations.
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TL;DR: The binary system PbO-BiVO4 exhibits two new phases, Pb4BiVO8 and Pb2BiVO6, which both melt congruently at 780 °C.
Abstract: The binary system PbO–BiVO4 exhibits two new phases, Pb4BiVO8 and Pb2BiVO6. They both melt congruently at 780 °C. They have been identified by single-crystal and powder X-ray diffraction. Pb4BiVO8 crystallizes with a triclinic cell, a= 6.221(2)A, b= 7.603(5)A, c= 10.457(4)A, α= 100.40(3)°, β= 102.18(2)°, γ= 90.03(3)° and Z= 2. Pb2BiVO6 exhibits four phase transitions at 300, 415, 475 and 600 °C. The α phase, room-temperature form, is monoclinic with a=7.642(6)A, b= 5.81 2(5)A, c= 28.85(2)A, β=100.3(1)° and Z= 8. The β and γ phases are orthorhombic with a= 8.381(6)A, b= 16.65(1)A, c= 4.859(6)A, Z= 4 and a=14.304(7)A, b=10.14(1)A, c= 9.923(4)A, Z= 8, respectively. The δ phase is tetragonal with a= 12.110(2)A, c= 9.472(8)A and Z= 8.
36 citations
TL;DR: Pb3(pdc)2(NO3)2·4H2O (pdc=deprotonated 3,5-pyrazole-dicarboxylic acid) has been prepared and is stable up to 100°C as discussed by the authors.
24 citations
TL;DR: A crystalline form of anhydrous 3,5-pyrazole dicarboxylic acid (H 3 pdc) has been identified by a variable temperature diffraction study of the commercial form as discussed by the authors.
12 citations