TY - JOUR
T1 - Preparation and properties of a basic lead calcium carbonate-swelling mica complex
AU - Uehara, Motoki
AU - Yamazaki, Atsushi
AU - Tsutsumi, Sadao
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1997/10
Y1 - 1997/10
N2 - A basic lead calcium carbonate-swelling mica complex (surite-like material, SLM), Pb2.11Ca0.83Na0.12(CO3) 2.08 (OH)1.11 (Si3.95Al0.04)Mg2.66O10 (F,OH)2·0.06H2O, was prepared by treating a swelling mica hydrothermally at 250°C with lead powder, dry ice and calcium nitrate solution. The product showed the morphology of thin hexagonal plates of 4 μm in diameter that have no swelling characteristics. Its symmetry is monoclinic; a=0.5204(3) nm, b=0.9080(9) nm, c=1.6231(8) nm, β=90.20(10)°. The X-ray powder diffraction pattern is characterized by a basal reflection of 1.62 nm and its subsequent integer reflections up to the 14th order. The chemical analysis and one dimensional Fourier synthesis results proved that SLM has an interlayer structure similar to that of natural surite, while the octahedral cation in the 2 : 1 layer consists of only Mg unlike the 2:1 layer of natural surite. The thermal behavior of SLM is similar to that of natural surite in the point that the hydroxyl in the interlayer dehydrates prior to the decomposition of the carbonate structure in the interlayer and also that the carbonate structure decomposes accompanying the collapse of the 2 : 1 layer structure.
AB - A basic lead calcium carbonate-swelling mica complex (surite-like material, SLM), Pb2.11Ca0.83Na0.12(CO3) 2.08 (OH)1.11 (Si3.95Al0.04)Mg2.66O10 (F,OH)2·0.06H2O, was prepared by treating a swelling mica hydrothermally at 250°C with lead powder, dry ice and calcium nitrate solution. The product showed the morphology of thin hexagonal plates of 4 μm in diameter that have no swelling characteristics. Its symmetry is monoclinic; a=0.5204(3) nm, b=0.9080(9) nm, c=1.6231(8) nm, β=90.20(10)°. The X-ray powder diffraction pattern is characterized by a basal reflection of 1.62 nm and its subsequent integer reflections up to the 14th order. The chemical analysis and one dimensional Fourier synthesis results proved that SLM has an interlayer structure similar to that of natural surite, while the octahedral cation in the 2 : 1 layer consists of only Mg unlike the 2:1 layer of natural surite. The thermal behavior of SLM is similar to that of natural surite in the point that the hydroxyl in the interlayer dehydrates prior to the decomposition of the carbonate structure in the interlayer and also that the carbonate structure decomposes accompanying the collapse of the 2 : 1 layer structure.
KW - Basic lead calcium carbonate
KW - Surite
KW - Swelling mica
KW - Thermal behavior
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U2 - 10.2109/jcersj.105.897
DO - 10.2109/jcersj.105.897
M3 - Article
AN - SCOPUS:5344263078
SN - 1882-0743
VL - 105
SP - 897
EP - 901
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
IS - 10
ER -