Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Sytle M. Antao"'
Autor:
Sytle M. Antao, James W. Nicholls
Publikováno v:
Frontiers in Earth Science, Vol 6 (2018)
Natural nepheline (Nph) samples are intermediate members of solid solutions that extend from the pure Na end-member Na[AlSiO4] to the pure K end-member K[AlSiO4] (=kalsilite, Kls). We examined two volcanic nepheline (ideally, K2Na6[Al8Si8O32] or Nph0
Externí odkaz:
https://doaj.org/article/2956f89b53864a5283230edd14080a84
Autor:
Guy L. Hovis, Sytle M. Antao
Publikováno v:
American Mineralogist. 106:801-811
The crystal structures of 19 samples from the nepheline (NaAlSiO4; Ne)–kalsilite (KAlSiO4; Ks) series, previously prepared via ion-exchange, were examined using synchrotron high-resolution powder X-ray diffraction (HRPXRD) data and Rietveld structu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0bc3ce60e859cb54658c28f8742581f
https://doi.org/10.2138/am-2021-7484
https://doi.org/10.2138/am-2021-7484
Autor:
Darren A. Umbsaar, Sytle M. Antao
Publikováno v:
Minerals; Volume 12; Issue 1; Pages: 42
Minerals, Vol 12, Iss 42, p 42 (2022)
Minerals, Vol 12, Iss 42, p 42 (2022)
The crystal structure of four samples from natural wolframite solid solutions, (Fe,Mn)WO4, was obtained with synchrotron high-resolution powder X-ray diffraction (HRPXRD) data, Rietveld refinements, space group P2/c, and Z = 2. Wolframite solid solut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08793e075bc894dc07dbfd2ba7abf10e
Autor:
Sytle M. Antao, M. Mashrur Zaman
Publikováno v:
Minerals, Vol 11, Iss 16, p 16 (2021)
Minerals
Volume 11
Issue 1
Minerals
Volume 11
Issue 1
This study examines two pegmatitic monazite samples (2a and 4b, these numbers are related to a previous study) to determine their crystal chemistry and effects of internal radiation damage using synchrotron high-resolution powder X-ray diffraction an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ac9494ca7c57f64b77a8d8fc0cf91de
https://www.mdpi.com/2075-163X/11/1/16
https://www.mdpi.com/2075-163X/11/1/16
Autor:
Sytle M. Antao
Publikováno v:
Minerals, Vol 11, Iss 1320, p 1320 (2021)
Minerals; Volume 11; Issue 12; Pages: 1320
Minerals; Volume 11; Issue 12; Pages: 1320
The crystal structure of two different samples of pyrope garnet, ideally Mg3Al2Si3O12, from South Africa was refined using the Rietveld method, space group Ia3¯d, and monochromatic synchrotron high-resolution powder X-ray diffraction (HRPXRD) data.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::217fc822a573b98b16e3096a89f3e042
https://www.mdpi.com/2075-163X/11/12/1320
https://www.mdpi.com/2075-163X/11/12/1320
Autor:
Sytle M. Antao
Publikováno v:
Minerals, Vol 11, Iss 325, p 325 (2021)
Minerals
Volume 11
Issue 3
Minerals
Volume 11
Issue 3
Synchrotron high-resolution powder X-ray diffraction (HRPXRD) and Rietveld structure refinements were used to examine the crystal structure of single phases and intergrowths (either two or three phases) in 13 samples of the helvine-group minerals, (Z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e8910b64037fa945c267194b3e13321
https://www.mdpi.com/2075-163X/11/3/325
https://www.mdpi.com/2075-163X/11/3/325
Autor:
Sytle M. Antao, M. Mashrur Zaman
Publikováno v:
Minerals, Vol 10, Iss 1028, p 1028 (2020)
Minerals
Volume 10
Issue 11
Minerals
Volume 10
Issue 11
This study investigates the crystal chemistry of monazite (APO4, where A = Lanthanides = Ln, as well as Y, Th, U, Ca, and Pb) based on four samples from different localities using single-crystal X-ray diffraction and electron-probe microanalysis. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57bd04fb090fa66b87e1146d8e5da484
https://www.mdpi.com/2075-163X/10/11/1028
https://www.mdpi.com/2075-163X/10/11/1028
Autor:
Sytle M. Antao, M. Mashrur Zaman
Publikováno v:
Minerals, Vol 10, Iss 947, p 947 (2020)
Minerals
Volume 10
Issue 11
Minerals
Volume 10
Issue 11
This study investigates the variations of structural parameters and chemistry of a partially metamict and seven detrital zircon samples from different localities using single-crystal X-ray diffraction, synchrotron high-resolution powder X-ray diffrac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e21ad9283be7a6da7f17ba1b3198752
https://www.mdpi.com/2075-163X/10/11/947
https://www.mdpi.com/2075-163X/10/11/947
Autor:
Laura A. Cruickshank, Sytle M. Antao
Publikováno v:
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials. 74:104-114
Cubic garnet (space group Ia\overline 3 d) has the general formula X 3 Y 2 Z 3O12, where X, Y and Z are cation sites. In the tetragonal garnet (space group I41/acd), the corresponding cation sites are X1 and X2, Y, and Z1 and Z2. In both space groups
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::209bd609d946862d9a276268fbb1a82b
https://doi.org/10.1107/s2052520617018248
https://doi.org/10.1107/s2052520617018248
Autor:
Sytle M. Antao, Inayat Dhaliwal
Publikováno v:
Journal of Synchrotron Radiation. 25:214-221
The crystal structure of four Pb apatite samples, Pb5(BO4)3Cl, was refined with synchrotron high-resolution powder X-ray diffraction data, Rietveld refinements, space group P63/m and Z = 2. For this isotypic series, B = P5+ is pyromorphite, B = As5+
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9e69ae7e140749f64b6d9f2a7629ecd
https://doi.org/10.1107/s1600577517014217
https://doi.org/10.1107/s1600577517014217