Crystal-chemical characterisation and spectroscopy of fluorcarletonite and carletonite

IF 2.8 3区地球科学 Q2 MINERALOGY

Mineralogical Magazine Pub Date : 2023-03-03 DOI:10.1180/mgm.2023.15

E. Kaneva, A. Bogdanov, T. Radomskaya, O. Belozerova, R. Shendrik

{"title":"Crystal-chemical characterisation and spectroscopy of fluorcarletonite and carletonite","authors":"E. Kaneva, A. Bogdanov, T. Radomskaya, O. Belozerova, R. Shendrik","doi":"10.1180/mgm.2023.15","DOIUrl":null,"url":null,"abstract":"Abstract The minerals of carletonite group, fluorcarletonite, KNa4Ca4[Si8O18](CO3)4(F,OH)·H2O and carletonite, Na4Ca4[Si8O18](CO3)4(OH,F)·H2O, were investigated using a multi-method approach. A detailed comparative chemical study of the minerals was carried out using electron probe microanalysis and Fourier transform infrared spectroscopy. Using X-ray techniques and the results obtained, geometrical and distortion characteristics of the mineral structures are calculated and the successful crystal-structure refinement of these two natural compounds are given. Using spectroscopic and luminescence methods and ab initio calculations, it is shown that hole defects (CO3)•– are responsible for the colouration of the samples studied. Luminescence due to 5d–4f transition in Ce3+ ions is observed in both investigated compounds. Moreover, luminescence attributed to intrinsic luminescence, corresponding to the decay of electronic excitations of (CO3)2– complexes in the carletonite sample, is registered for the first time in phyllosilicates. An analysis of the optical absorption spectra and g-tensor values suggests that (CO3)•– defects in the crystal structure are localised in the C1 positions. Identification of these specific properties for these sheet silicates, with a two-dimensional infinite tetrahedral polymerisation, indicates that carletonites could be prospective materials for novel phosphors and luminophores.","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":"87 1","pages":"356 - 368"},"PeriodicalIF":2.8000,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mineralogical Magazine","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1180/mgm.2023.15","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MINERALOGY","Score":null,"Total":0}

引用次数: 2

Abstract

Abstract The minerals of carletonite group, fluorcarletonite, KNa4Ca4[Si8O18](CO3)4(F,OH)·H2O and carletonite, Na4Ca4[Si8O18](CO3)4(OH,F)·H2O, were investigated using a multi-method approach. A detailed comparative chemical study of the minerals was carried out using electron probe microanalysis and Fourier transform infrared spectroscopy. Using X-ray techniques and the results obtained, geometrical and distortion characteristics of the mineral structures are calculated and the successful crystal-structure refinement of these two natural compounds are given. Using spectroscopic and luminescence methods and ab initio calculations, it is shown that hole defects (CO3)•– are responsible for the colouration of the samples studied. Luminescence due to 5d–4f transition in Ce3+ ions is observed in both investigated compounds. Moreover, luminescence attributed to intrinsic luminescence, corresponding to the decay of electronic excitations of (CO3)2– complexes in the carletonite sample, is registered for the first time in phyllosilicates. An analysis of the optical absorption spectra and g-tensor values suggests that (CO3)•– defects in the crystal structure are localised in the C1 positions. Identification of these specific properties for these sheet silicates, with a two-dimensional infinite tetrahedral polymerisation, indicates that carletonites could be prospective materials for novel phosphors and luminophores.

查看原文本刊更多论文

氟碳榴石和碳榴石的晶体化学性质及光谱

摘要采用多种方法研究了碳钙石族矿物氟碳钙石KNa4Ca4[Si8O18]（CO3）4（F，OH）·H2O和碳钙石Na4Ca4[Si8O18]（CO3，OH）4（OH，F）·H2O。利用电子探针微量分析和傅立叶变换红外光谱对这些矿物进行了详细的对比化学研究。利用X射线技术和所获得的结果，计算了矿物结构的几何和畸变特征，并给出了这两种天然化合物晶体结构的成功细化。使用光谱和发光方法以及从头算计算表明，空穴缺陷（CO3）•–是所研究样品着色的原因。在两种研究的化合物中都观察到Ce3+离子中5d–4f跃迁引起的发光。此外，在层状硅酸盐中首次记录了归因于本征发光的发光，该发光对应于钙长石样品中（CO3）2–络合物的电子激发的衰减。对光学吸收光谱和g张量值的分析表明，晶体结构中的（CO3）•缺陷位于C1位置。通过二维无限四面体聚合，对这些片状硅酸盐的这些特定性质进行了鉴定，表明卡莱托石可能是新型磷光体和发光体的潜在材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Mineralogical Magazine 地学-矿物学

CiteScore

4.00

自引率

25.90%

发文量

104

审稿时长

6-12 weeks

期刊介绍： Mineralogical Magazine is an international journal of mineral sciences which covers the fields of mineralogy, crystallography, geochemistry, petrology, environmental geology and economic geology. The journal has been published continuously since the founding of the Mineralogical Society of Great Britain and Ireland in 1876 and is a leading journal in its field.