Sodium diffusion in alkali feldspars: Towards the impact of Al/Si ordering
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913623289364480 |
|---|---|
| author | Kulitckaya, Olga Gorfer, Alexander Petrishcheva, Elena Tas, Bengü Kulitckii, Vladislav Wilde, Gerhard Abart, Rainer Divinski, Sergiy V. |
| author_facet | Kulitckaya, Olga Gorfer, Alexander Petrishcheva, Elena Tas, Bengü Kulitckii, Vladislav Wilde, Gerhard Abart, Rainer Divinski, Sergiy V. |
| contents | Tracer diffusion of Na in natural alkali feldspars including sanidine, adularia and orthoclase with different Na:K ratios is measured using the radiotracer technique and applying the 22Na radioisotope. The tracer diffusion measurements along the crystallographic directions perpendicular to (001) and (010) in alularia feldspar reveled a slight (within a factor of two to three) anisotropy of Na diffusion with the faster diffusion rates along the perpendicular to (001) directions, while this difference was less prominent in orthoclase. The anisotropy of Na diffusion is specifically addressed for orthoclase and the full diffusion tensor is determined. The impact of temperature and composition on diffusion in natural alkali feldspars is discussed with respect to impurities and intrinsic defects. The state of Al/Si ordering is proposed to have a significant influence on the Na diffusion rates in alkali feldspars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_11635 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sodium diffusion in alkali feldspars: Towards the impact of Al/Si ordering Kulitckaya, Olga Gorfer, Alexander Petrishcheva, Elena Tas, Bengü Kulitckii, Vladislav Wilde, Gerhard Abart, Rainer Divinski, Sergiy V. Materials Science Tracer diffusion of Na in natural alkali feldspars including sanidine, adularia and orthoclase with different Na:K ratios is measured using the radiotracer technique and applying the 22Na radioisotope. The tracer diffusion measurements along the crystallographic directions perpendicular to (001) and (010) in alularia feldspar reveled a slight (within a factor of two to three) anisotropy of Na diffusion with the faster diffusion rates along the perpendicular to (001) directions, while this difference was less prominent in orthoclase. The anisotropy of Na diffusion is specifically addressed for orthoclase and the full diffusion tensor is determined. The impact of temperature and composition on diffusion in natural alkali feldspars is discussed with respect to impurities and intrinsic defects. The state of Al/Si ordering is proposed to have a significant influence on the Na diffusion rates in alkali feldspars. |
| title | Sodium diffusion in alkali feldspars: Towards the impact of Al/Si ordering |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.11635 |