Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Ishmael Hassan"'
Autor:
Willem H. Mulder, Ishmael Hassan
Publikováno v:
The Canadian Mineralogist. 49:1035-1043
A thermodynamic analysis of the order–disorder transition in calcite, based on a modified Bragg–Williams model, has been extended to include the first-order transition from aragonite to calcite, with a view to developing a quantitative understand
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1439b86221251b0e0ba0a1463da6cd78
https://doi.org/10.3749/canmin.49.4.1035
https://doi.org/10.3749/canmin.49.4.1035
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
Powder Diffraction. 26:119-125
The crystal structures of marialite (Me6) from Badakhshan, Afghanistan and meionite (Me93) from Mt. Vesuvius, Italy were obtained using synchrotron high-resolution powder X-ray diffraction (HRPXRD) data and Rietveld structure refinements. Their struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cce1b899129fb18a29fbecd258261841
https://doi.org/10.1154/1.3582802
https://doi.org/10.1154/1.3582802
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 49:581-586
The structure of an intermediate scapolite (Me{sub 36.6}) from Lake Clear, Ontario, was obtained using synchrotron high-resolution powder X-ray diffraction (HRPXRD) data and Rietveld structure refinement in space group P4{sub 2}/n. The chemical formu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c40d531d2a128904ca164e0275b0119e
https://doi.org/10.3749/canmin.49.2.581
https://doi.org/10.3749/canmin.49.2.581
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 48:1225-1236
The temperature dependency of the crystal structure and the polymorphic transition of CaCO{sub 3} from aragonite to calcite were studied using Rietveld structure refinement and high-temperature in situ synchrotron powder X-ray-diffraction data at amb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ec00845049555f3ae0ec5e5e4a9f636
https://doi.org/10.3749/canmin.48.5.1225
https://doi.org/10.3749/canmin.48.5.1225
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 48:1217-1223
Synchrotron high-resolution powder X-ray-diffraction (HRPXRD) data and Rietveld structure refinement were used to examine a two-phase intergrowth of genthelvite, ideally Zn{sub 8}[Be{sub 6}Si{sub 6}O{sub 24}]S{sub 2}, from the alkaline intrusive comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ebbf09338fd5a31712a0e6da30b0588
https://doi.org/10.3749/canmin.48.5.1217
https://doi.org/10.3749/canmin.48.5.1217
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 48:69-80
The crystal structure of three samples of nepheline (ideally, K{sub 2}Na{sub 6}[Al{sub 8}Si{sub 8}O{sub 32}]) from the Bancroft area of Ontario (1a, b: Egan Chute, 2: Nephton, and 3: Davis Hill), each with different types of superstructure reflection
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42125f3c39823083533443f6b3bd811c
https://doi.org/10.3749/canmin.48.1.69
https://doi.org/10.3749/canmin.48.1.69
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 47:1245-1255
The crystal structures of four isostructural orthorhombic carbonates, CaCO{sub 3} (aragonite), SrCO{sub 3} (strontianite), PbCO{sub 3} (cerussite), and BaCO{sub 3} (witherite), were obtained by Rietveld refinements using data acquired by synchrotron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e6a0dcf6dce7cd2a8e5e78c0e1bc1ba
https://doi.org/10.3749/canmin.47.5.1245
https://doi.org/10.3749/canmin.47.5.1245
Autor:
Ishmael Hassan, Sytle M. Antao
Publikováno v:
The Canadian Mineralogist. 46:1577-1591
Scapolite Me 32.9 (marialite) from Monmouth Township, Ontario, was studied using in situ synchrotron powder X-ray diffraction (XRD) and Rietveld structure refinement of data obtained by heating and cooling from 26 to 902°C. The structure was refined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b7ae4bde0b197578bd6b07924967ba0
https://doi.org/10.3749/canmin.46.5.1577
https://doi.org/10.3749/canmin.46.5.1577
Publikováno v:
The Canadian Mineralogist. 46:1501-1509
Synchrotron high-resolution powder X-ray diffraction (HRPXRD) data and Rietveld structure refinements were used to examine the crystal structures of quartz, sodalite, tremolite, and meionite Me79.6, and compare them with those obtained by single-crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dea49841c6a19408c0a05241e363e05
https://doi.org/10.3749/canmin.46.5.1501
https://doi.org/10.3749/canmin.46.5.1501
Publikováno v:
Physics and Chemistry of Minerals. 35:545-557
The temperature dependences of the crystal structure and superstructure intensities in sodium nitrate, mineral name nitratine, NaNO3, were studied using Rietveld structure refinements based on synchrotron powder X-ray diffraction. Nitratine transform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36111c083e908a124f87bf7e2eb622c8
https://doi.org/10.1007/s00269-008-0232-8
https://doi.org/10.1007/s00269-008-0232-8