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具有白钠镁矾框架结构的混合金属磷酸盐KNaTiFe(PO)和KNaTiFe(PO) 。

Mixed-metal phosphates KNaTiFe(PO) and KNaTiFe(PO) with a langbeinite framework.

作者信息

Zatovsky Igor V, Strutynska Nataliia Yu, Ogorodnyk Ivan V, Baumer Vyacheslav N, Slobodyanik Nickolai S, Butenko Denis S

机构信息

F.D. Ovcharenko Institute of Biocolloidal Chemistry, NAS Ukraine, 42 Acad. Vernadskoho blv., 03142 Kyiv, Ukraine.

Department of Inorganic Chemistry, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Str., 01601 Kyiv, Ukraine.

出版信息

Acta Crystallogr E Crystallogr Commun. 2021 Nov 16;77(Pt 12):1299-1302. doi: 10.1107/S2056989021011877. eCollection 2021 Dec 1.

DOI:10.1107/S2056989021011877
PMID:34925902
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8647752/
Abstract

Single crystals of the langbeinite-type phosphates KNaTiFe(PO) and KNaTiFe(PO) were grown by crystallization from high-temperature self-fluxes in the system NaO-KO-PO-TiO-FeO using fixed molar ratios of (Na+K):P = 1.0, Ti:P = 0.20 and Na:K = 1.0 or 2.0 over the temperature range 1273-953 K. The three-dimensional framework of the two isotypic phosphates are built up from [(Ti/Fe)(PO)] structure units containing two mixed [(Ti/Fe)O] octa-hedra (site symmetry 3) connected three bridging PO tetra-hedra. The potassium and sodium cations share two different sites in the structure that are located in the cavities of the framework. One of these sites has nine and the other twelve surrounding O atoms.

摘要

采用固定摩尔比(Na + K):P = 1.0、Ti:P = 0.20以及Na:K = 1.0或2.0，在1273 - 953 K温度范围内，通过高温自熔剂法从Na₂O - K₂O - P₂O₅ - TiO₂ - Fe₂O₃体系中生长出了磷钾铁矿型磷酸盐KNaTiFe(PO₄)₂和KNaTiFe(PO₄)₂的单晶。这两种同型磷酸盐的三维骨架由[(Ti/Fe)(PO₄)]结构单元构成，该结构单元包含两个由三个桥连PO₄四面体连接的混合[(Ti/Fe)O₆]八面体（点群对称性3）。钾离子和钠离子在结构中占据两个不同的位置，位于骨架的空穴中。其中一个位置周围有9个氧原子，另一个位置周围有12个氧原子。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/07afa1ed74df/e-77-01299-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/8b836df4f662/e-77-01299-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/d2e665a9c0de/e-77-01299-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/b8693dd9fb34/e-77-01299-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/07afa1ed74df/e-77-01299-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/8b836df4f662/e-77-01299-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/d2e665a9c0de/e-77-01299-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/b8693dd9fb34/e-77-01299-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7890/8647752/07afa1ed74df/e-77-01299-fig4.jpg

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本文引用的文献

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Partial Substitution of Potassium with Sodium in the KTi(PO) Langbeinite-Type Framework: Synthesis and Crystalline Structure of KNaTi(PO).在钾霞石型框架中用钠部分替代钾：KNaTi(PO)₄的合成与晶体结构
ChemistryOpen. 2018 Jun 20;7(7):504-512. doi: 10.1002/open.201800059. eCollection 2018 Jul.
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