Details
| Original language | English |
|---|---|
| Pages (from-to) | 15-24 |
| Number of pages | 10 |
| Journal | Mineralogical magazine |
| Volume | 59 |
| Issue number | 1 |
| Publication status | Published - Mar 1995 |
Abstract
Hydrogen in H-feldspar obtained by ion-exchange was studied in the spectral range 1000-5500 cm-1 by single crystal IR microspectroscopy. Spectra were almost identical for H-feldspars prepared either from sanidine or from adularia. Two bands in the middle-infrared were identified by D/H exchange as OH vibration modes. One broad band with a maximum at 3000 cm-1 and shoulders at 2800, 3200 and 3500 cm-1 confirms previous work. An additional OH absorption band with a maximum at 2485 cm-1 was observed for the first time in feldspars. The pleochroisms of the OH absorption bands suggests that the H-feldspar is composed of two phases, an amorphous phase and a feldspathic phase. The experimental results imply that hydrogen is incorporated in the H-feldspars as protons attached to bridging oxygen as well as to non-bridging oxygen. The complex structure of the IR spectra implies that the protons are distributed over a large number of sites in the cation cavity of the feldspars. -from Authors
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
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In: Mineralogical magazine, Vol. 59, No. 1, 03.1995, p. 15-24.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An infrared spectroscopic study of hydrogen feldspar (HAlSi3O8)
AU - Behrens, H.
AU - Muller, G.
PY - 1995/3
Y1 - 1995/3
N2 - Hydrogen in H-feldspar obtained by ion-exchange was studied in the spectral range 1000-5500 cm-1 by single crystal IR microspectroscopy. Spectra were almost identical for H-feldspars prepared either from sanidine or from adularia. Two bands in the middle-infrared were identified by D/H exchange as OH vibration modes. One broad band with a maximum at 3000 cm-1 and shoulders at 2800, 3200 and 3500 cm-1 confirms previous work. An additional OH absorption band with a maximum at 2485 cm-1 was observed for the first time in feldspars. The pleochroisms of the OH absorption bands suggests that the H-feldspar is composed of two phases, an amorphous phase and a feldspathic phase. The experimental results imply that hydrogen is incorporated in the H-feldspars as protons attached to bridging oxygen as well as to non-bridging oxygen. The complex structure of the IR spectra implies that the protons are distributed over a large number of sites in the cation cavity of the feldspars. -from Authors
AB - Hydrogen in H-feldspar obtained by ion-exchange was studied in the spectral range 1000-5500 cm-1 by single crystal IR microspectroscopy. Spectra were almost identical for H-feldspars prepared either from sanidine or from adularia. Two bands in the middle-infrared were identified by D/H exchange as OH vibration modes. One broad band with a maximum at 3000 cm-1 and shoulders at 2800, 3200 and 3500 cm-1 confirms previous work. An additional OH absorption band with a maximum at 2485 cm-1 was observed for the first time in feldspars. The pleochroisms of the OH absorption bands suggests that the H-feldspar is composed of two phases, an amorphous phase and a feldspathic phase. The experimental results imply that hydrogen is incorporated in the H-feldspars as protons attached to bridging oxygen as well as to non-bridging oxygen. The complex structure of the IR spectra implies that the protons are distributed over a large number of sites in the cation cavity of the feldspars. -from Authors
UR - http://www.scopus.com/inward/record.url?scp=0029480532&partnerID=8YFLogxK
U2 - 10.1180/minmag.1995.59.394.02
DO - 10.1180/minmag.1995.59.394.02
M3 - Article
AN - SCOPUS:0029480532
VL - 59
SP - 15
EP - 24
JO - Mineralogical magazine
JF - Mineralogical magazine
SN - 0026-461X
IS - 1
ER -