SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "Hålenius mat:art lärosäte:nrm språk:eng ;pers:(Fernandez Diaz Maria Teresa)"

Extended search > Hålenius mat:art lärosäte:nrm språk:eng > Fernandez Diaz Maria Teresa

  • Result 1-2 of 2
Sort/group result
   
EnumerationReferenceCoverFind
1.
  •  
2.
  • Gatta, Diego, et al. (author)
  • H-bonding scheme in allactite: a combined single-crystal X-ray and neutron diffraction, optical absorption spectroscopy, FTIR and EPMA-WDS study
  • 2016
  • In: Mineralogical magazine. - : Mineralogical Society. - 0026-461X .- 1471-8022. ; 80:5, s. 719-732
  • Journal article (peer-reviewed)abstract
    • The crystal chemistry of allactite from Långban, Värmland (Sweden) was investigated by single-crystal X-ray and neutron diffraction, optical absorption spectroscopy, Fourier-transform infra-red spectroscopy (FTIR) and electron microprobe analysis by wavelength-dispersive spectroscopy (EPMA-WDS). The optical spectra indicate the presence of Mn in valence state 2+ only. Assuming 16 O atoms per formula unit, arsenic as As5+ and the (OH) content calculated by charge balance, the resulting formula based on the EPMA-WDS data is (Mn6.732+Ca0.13Mg0.12Zn0.02)Σ7.00(As5+)2.00O16H8, very close to the ideal composition Mn7(AsO4)2(OH)8. In the unpolarized FTIR spectrum of allactite, fundamental (OH)-stretching bands are observed at 3236, 3288, 3387, 3446, 3484, 3562 and 3570 cm–1, suggesting that a number of OH environments, with different hydrogen bond strengths, occur in the structure. The neutron structure refinement shows that four independent H sites occur in allactite with full site occupancy, all as members of hydroxyl groups. The complex hydrogen-bonding scheme in the allactite structure is now well defined, with at least nine hydrogen bonds energetically favourable with mono-, bi- and trifurcated configurations.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Hålenius, Ulf (2)
Bosi, Ferdinando (2)
Fernandez Diaz, ... (2)Undo refine
Canadillas-Delgado, ... (1)
Gatta, Diego (1)
Gatta, G. Diego (1)
University
Swedish Museum of Natural History (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

Year

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view