Studies on the local structure of the F ∕ OH site in topaz by magic angle spinning nuclear magnetic resonance and Raman spectroscopy

Abstract 2 SiO4 (F,OH) 2) was investigated using magic angle spinning nuclear magnetic resonance (MAS NMR) and Raman spectroscopy. The splitting of 19 F and 1 H NMR signals, as well as the OH Raman band, provides evidence for hydrogen bond formation within the crystal structure. Depending on whether a given OH group has another OH group or fluoride as its neighbor, two different hydrogen bond constellations may form: either OH⋯ ⋯ ⋯ ⋯ 4 tetrahedron using 29 Si MAS NMR. Comparison of the MAS NMR data between an OH-bearing and an OH-free topaz sample confirms that the 19 F signal at - - ions that take part in H⋯ ∼ - - 1 - 1 ⋯ 27 Al MAS NMR, suggesting that the investigated samples likely have nearly ideal Al/Si ratios, making them potentially useful as high-density electron microprobe reference materials for Al and Si, as well as for F.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Studies on the local structure of the F ∕ OH site in topaz by magic angle spinning nuclear magnetic resonance and Raman spectroscopy ; volume:34 ; number:5 ; year:2022 ; pages:507-521 ; extent:15 ; European journal of mineralogy ; 34, Heft 5 (2022), 507-521 (gesamt 15)

Contributors, Places and Time

• Creator: Loges, Anselm ; Scholz, Gudrun ; de Sousa Amadeu, Nader ; Shao, Jingjing ; Schultze, Dina ; Fuller, Jeremy ; Paulus, Beate ; Emmerling, Franziska ; Braun, Thomas ; John, Timm

Further information

• DOI: 10.5194/ejm-34-507-2022
• URN: urn:nbn:de:101:1-2022102705152284450543
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:33 AM CEST