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Characterization of the cathodoluminescence emission of kamphaugite-(Y) and kristiansenite from Spain
Physics and Chemistry of Minerals ( IF 1.2 ) Pub Date : 2020-01-01 , DOI: 10.1007/s00269-019-01071-9
V. Correcher , J. Garcia-Guinea

This paper reports on the cathodoluminescence (CL) emission of kamphaugite-(Y) (CaY(CO 3 ) 2 (OH)·H 2 O) and kristiansenite [Ca 2 ScSn(Si 2 O 7 )(Si 2 O 6 OH)] that display very complex spectra. The carbonate sample, growing in spheres no longer than 3 mm, contains significant concentrations of REE giving rise to sharp and narrow wavebands peaked at 312, 486, 546, 574 and 626 nm. These wavebands would be, respectively, associated with the presence of Gd 3+ ( 6 P 7/2 → 8 S 7/2 transition), Dy 3+ ( 4 F 9/2 → 6 H 15/2 ), Tb 3+ ( 5 D 4 → 7 F 5 ), Dy 3+ ( 4 F 9/2 → 6 H 13/2 ) and Sm 3+ ( 4 G 5/2 → 6 H 7/2 ). Kristiansenite, appearing as an isolated pseudo-hexagonal pyramidal crystal smaller than 600 µm, hardly has lanthanide elements and the CL emission is composed of broad wavebands peaked at 298 nm (linked to defect-sites caused by the presence of the Na-0.49%), 334 (due to oxygen vacancies and Me–O bonding defects), 422 (–O–O– type defects and/or O 2− intrinsic defects), 494 (self-trapped excitons), 578 [Mn 2+ giving rise to 4 T 2 (G) → 6 A 1 (S) transition and/or Ti 4+ /Sn 4+ redox reactions] and 654 nm [due to Fe 3+ 4 T 1 (G) → 6 A 1 (S) transitions].

中文翻译:

西班牙钾辉石-(Y) 和克里斯蒂安石的阴极发光特征

本文报道了钾辉石-(Y) (CaY(CO 3 ) 2 (OH)·H 2 O) 和克里斯蒂安石 [Ca 2 ScSn(Si 2 O 7 )(Si 2 O 6 OH) 的阴极发光 (CL) 发射] 显示非常复杂的光谱。碳酸盐样品以不超过 3 毫米的球体生长,其中含有大量 REE,从而产生在 312、486、546、574 和 626 nm 处达到峰值的尖锐和窄波段。这些波段将分别与 Gd 3+ ( 6 P 7/2 → 8 S 7/2 跃迁)、Dy 3+ ( 4 F 9/2 → 6 H 15/2 )、Tb 3+ 的存在有关( 5 D 4 → 7 F 5 )、Dy 3+ ( 4 F 9/2 → 6 H 13/2 ) 和 Sm 3+ ( 4 G 5/2 → 6 H 7/2 )。Kristiansenite,以小于 600 µm 的孤立伪六方锥体晶体出现,
更新日期:2020-01-01
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