Crystal growth of praseodymium molybdate by gel method

Sanjay Pandita , Vinay Hangloo , K.K. Bamzai , P.N. Kotru , Neera Sahni
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引用次数: 6

Abstract

Experiments for the growth of praseodymium molybdate crystals using a silica gel method of crystal growth in the system PrCl3–(NH4)6Mo7O24–NH4NO3–HNO3–Na2SiO3 are reported. The Energy Dispersive Analysis of X-rays (EDAX) results suggest the crystals to be praseodymium heptamolybdate of the type Pr2Mo7O24. The crystals assumed varied morphologies, including spherulites, single crystal platelets, multifaceted and coalesced crystals. Some crystals exhibited a twinned structure. The spherulitic morphologies resulted from either the aggregation of crystals joining in a spherical envelope or the formation of an interpenetrating type with complex twinning. The layered structure on the crystal surfaces suggest that the crystals grew by two-dimensional spreading and a pile-up of layers.

凝胶法制备钼酸镨晶体生长
本文报道了在PrCl3 - (NH4) 6mo7024 - nh4no3 - hno3 - na2sio3体系中,用硅胶法生长钼酸镨晶体的实验。x射线的能量色散分析(EDAX)结果表明晶体为Pr2Mo7O24型七钼酸镨。这些晶体具有多种形态,包括球晶、单晶血小板、多面晶体和聚结晶体。有些晶体表现出孪生结构。球晶形态是由晶体聚集在一个球形包络中或形成具有复杂孪晶的互穿型形成的。晶体表面的层状结构表明,晶体是通过二维扩展和层的堆积而生长的。
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