Details
| Original language | English |
|---|---|
| Pages (from-to) | 595-608 |
| Number of pages | 14 |
| Journal | Geostandards and Geoanalytical Research |
| Volume | 47 |
| Issue number | 3 |
| Early online date | 20 Feb 2023 |
| Publication status | Published - 8 Aug 2023 |
Abstract
The amphiboles from Kakanui and Arenal are two natural minerals that have been used worldwide as microanalytical reference materials, but their compositions and crystal structures are still poorly constrained. In this paper, we report new data on H2O and trace element mass fractions and single-crystal structural refinement of these two amphiboles. H2O mass fractions of the Kakanui and Arenal amphiboles determined via Karl-Fischer titration are 0.92 ± 0.18 (2s) and 1.56 ± 0.22% m/m (2s), respectively; these values estimated based on crystal-structure refinement are 0.86 and 1.46% m/m, respectively. Trace element mass fractions measured via LA-ICP-MS in two laboratories are in good agreement, and spots from five fragments for both Kakanui and Arenal amphiboles are generally consistent within reproducibility precision (2s). Our measurements indicate a better homogeneity for the amphiboles from Kakanui than that from Arenal. According to the latest scheme for amphibole classification and nomenclature (Hawthorne et al. 2012), the sample from Arenal is a (partially dehydrogenated) pargasite, and that from Kakanui is a kaersutite. The significant amount of oxo-component and that CTi4+ content is strongly ordered at the M(1) site for both amphiboles indicate crystallisation under high fO2 conditions.
Keywords
- amphibole, Arenal, crystal structure, Kakanui, microbeam techniques, reference materials
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Geostandards and Geoanalytical Research, Vol. 47, No. 3, 08.08.2023, p. 595-608.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - New Compositional and Structural Constraints on theSmithsonian Microanalytical Reference Materials: Amphibolesfrom Kakanui and Arenal
AU - Liu, Yujie
AU - Yang, Wenqiang
AU - Zhang, Chao
AU - Bao, Zhian
AU - Wu, Shitou
AU - Almeev, Renat R.
AU - Ridolfi, Filippo
AU - Oberti, Roberta
N1 - Funding Information: We thank Timothy Rose (Smithsonian National Museum of Natural History) for offering extraordinarily large amounts of the amphibole references NMNH 143965 and NMNH 111365. This paper has benefited greatly from the critical review of an anonymous reviewer and helpful suggestions from chief editor Thomas Meisel. This study was supported by the National Natural Science Foundation of China (NSFC) Project (No. 41972055) and Shaanxi Provincial Department of Education (No. 15JK1752). The authors declare that they have no conflict of interest.
PY - 2023/8/8
Y1 - 2023/8/8
N2 - The amphiboles from Kakanui and Arenal are two natural minerals that have been used worldwide as microanalytical reference materials, but their compositions and crystal structures are still poorly constrained. In this paper, we report new data on H2O and trace element mass fractions and single-crystal structural refinement of these two amphiboles. H2O mass fractions of the Kakanui and Arenal amphiboles determined via Karl-Fischer titration are 0.92 ± 0.18 (2s) and 1.56 ± 0.22% m/m (2s), respectively; these values estimated based on crystal-structure refinement are 0.86 and 1.46% m/m, respectively. Trace element mass fractions measured via LA-ICP-MS in two laboratories are in good agreement, and spots from five fragments for both Kakanui and Arenal amphiboles are generally consistent within reproducibility precision (2s). Our measurements indicate a better homogeneity for the amphiboles from Kakanui than that from Arenal. According to the latest scheme for amphibole classification and nomenclature (Hawthorne et al. 2012), the sample from Arenal is a (partially dehydrogenated) pargasite, and that from Kakanui is a kaersutite. The significant amount of oxo-component and that CTi4+ content is strongly ordered at the M(1) site for both amphiboles indicate crystallisation under high fO2 conditions.
AB - The amphiboles from Kakanui and Arenal are two natural minerals that have been used worldwide as microanalytical reference materials, but their compositions and crystal structures are still poorly constrained. In this paper, we report new data on H2O and trace element mass fractions and single-crystal structural refinement of these two amphiboles. H2O mass fractions of the Kakanui and Arenal amphiboles determined via Karl-Fischer titration are 0.92 ± 0.18 (2s) and 1.56 ± 0.22% m/m (2s), respectively; these values estimated based on crystal-structure refinement are 0.86 and 1.46% m/m, respectively. Trace element mass fractions measured via LA-ICP-MS in two laboratories are in good agreement, and spots from five fragments for both Kakanui and Arenal amphiboles are generally consistent within reproducibility precision (2s). Our measurements indicate a better homogeneity for the amphiboles from Kakanui than that from Arenal. According to the latest scheme for amphibole classification and nomenclature (Hawthorne et al. 2012), the sample from Arenal is a (partially dehydrogenated) pargasite, and that from Kakanui is a kaersutite. The significant amount of oxo-component and that CTi4+ content is strongly ordered at the M(1) site for both amphiboles indicate crystallisation under high fO2 conditions.
KW - amphibole
KW - Arenal
KW - crystal structure
KW - Kakanui
KW - microbeam techniques
KW - reference materials
UR - http://www.scopus.com/inward/record.url?scp=85152940439&partnerID=8YFLogxK
U2 - 10.1111/ggr.12486
DO - 10.1111/ggr.12486
M3 - Article
AN - SCOPUS:85152940439
VL - 47
SP - 595
EP - 608
JO - Geostandards and Geoanalytical Research
JF - Geostandards and Geoanalytical Research
SN - 1639-4488
IS - 3
ER -