Preparation of Zeolite-like Niobates and Tantalates

对含有铌或钽类化合物的新制备是在四氢铵的存在下研究的羟基条件。起始材料是聚氰酸酯、聚氰酸酯或氨氧化物，其预备温度范围从90 ° C至200 ° C不等。任何结构的化合物的准备是<NbO_6>由<TaO_6>Octahedra组成的。在系统中<A_2O>，<Q_2O>-<Nb_2O_5>，<Ta_2O_5>-<H_2O>（A<NaNbO_3>; alkali metal， Q;四氢铵），有日光型结构， &lt;Li_（3-x）H_xTaO_4&gt;有NaCl型结构，&lt;A_（1-x）H_xTaO_3&gt; ·n有焦氯型结构准备好，不含有四氢铵<H_2O>。这些化合物不可能与那些在zeolites中的微型材料相比较。从分层化合物中制备微型多孔材料。大型羟基复合体were attempted to be inserted into the interlayer spaces of &lt;K_4Nb_6O_（17）&gt; ·n <H_2O>by ion exchange。Ni和Al Were T的复合体 ... More 把它放在中间层空间，给一个更大的基础空间。但是，这些材料的热稳定性比从粘土矿物中获得的类似材料要少。用框架组成的多种多样性ra的多种化合物的准备。在-系统中<Na_2O><Q_2O><Nb_2O_5><P_2O_5><H_2O>，与分层化合物相关的几个新化合物，<NbOPO_4>·n<H_2O>，当<Nb_2O_5>/<P_2O_5>was &lt;1/18.假设这些化合物在与<NbOPO_4>强氢键或<PO_4>四特拉赫德拉相连的层中有结构。一个由三个更广泛的结构组成的复合物，其中含有四氢铵，可以与结构中的其他化合物和沸石水交换。这就是为什么我们认为这个化合物是一个新的类似于微孢子的化合物。对这个化合物的进一步调查是不可取的。使用<Al_2O_3>、<Bi_2O_3>、<SiO_2>，<ZrO_2>并<Sb_2O_5>在与坏晶体形成的变态材料或化合物的过程中得到了结果。Less（低）

Preparation of new zeolite-like compounds containing niobium or tantalum was attempted under the hydrothermal conditions in the presence of quaternary ammonium ions. The starting materials were polyniobate, polytantalate or amorphous oxide and the preparative temperature ranged from 90 to 200゜C.1. Preparation of compounds of which structures are composed of <NbO_6> or <TaO_6> octahedra. In the system of <A_2O> , <Q_2O> - <Nb_2O_5> , <Ta_2O_5> - <H_2O> (A; alkali metal, Q; quaternary ammonium), <NaNbO_3> with ilmenite type structure, <Li_(3-x)H_xTaO_4> with NaCl type structure and <A_(1-x)H_xTaO_3> ・n <H_2O> with pyrochlore type structure were prepared, containing no quaternary ammonium. These compounds do not have micro pores comparable with those in zeolites.2. Preparation of micro porous materials from layered compound. Large hydroxo complex ions were attempted to be inserted into the interlayer spaces of <K_4Nb_6O_(17)> ・n <H_2O> by ion exchange. The complex ions of Ni and Al were t … More aken up into the interlayer spaces, giving large basal spacings. But thermal stabilities of these materials were less than similar materials obtained from clay minerals.3. Preparation of compounds with framework composed of several kinds of polyhedra. In the system of <Na_2O> - <Q_2O> - <Nb_2O_5> - <P_2O_5> - <H_2O> , several new compounds related to layered compound, <NbOPO_4> ・n <H_2O> , were obtained, when <Nb_2O_5> / <P_2O_5> was <1/18.Those are considered to have structure in which the layers of <NbOPO_4> are linked with strong hydrogen bond or <PO_4> tetrahedra. A compound with the latter three dimensional structure contains quaternary ammonium ions exchangeable with other cations and zeolitic water in the structure. Therefore this compound is considered to be a new zeolite-like compound with micro pore. Further investigation on this compound is desirable.Attempts by using <Al_2O_3> , <Bi_2O_3> , <SiO_2> , <ZrO_2> and <Sb_2O_5> resulted in the formation of amorphous materials or compounds with bad cryistallinity. Less