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Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine

  • Metaadatok
Tartalom: http://real.mtak.hu/16426/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published



Type = Article
Cím:
Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine
Létrehozó:
Ingrin, Jannick
Kovács, István János
Deloule, Etienne
Balan, Etienne
Blanchard, Marc
Kohn, Simon C.
Hermann, Joerg
Kiadó:
Mineralogical Society of America
Dátum:
2014
Téma:
QD05 Crystallography / kristálytan
QD06 Mineralogy / ásványtan
QE02 Geochemistry / geokémia
Tartalmi leírás:
Experimental and theoretical evidence for the coupled substitution of B and H in synthetic forsterite and a natural olivine is presented. The intensities of OH bands at 3704 (//z), 3598 (//x,y), ((AU:OK?)) and 3525 cm–1 (//x) in a heterogeneous B-doped synthetic forsterite crystal matches the zoning of B concentration measured by ion probe. The two anti-symmetric stretching vibrations of BO3 groups occur at 1301 cm–1 (//x) and 1207 cm–1 (//z) for the 10B and at 1256 and 1168 cm–1 for the 11B isotope. A microscopic model of the mixed (B,H) defect that accounts for experimental observations is obtained from quantum mechanical calculations. The BO3 group lies on the (O3-O1-O3) face of the vacant Si site and the H atom is bonded to the O2 atom at the remaining apex. The occurrence of the same OH bands associated with n3 BO3 vibrations in a natural olivine sample from Pakistan confirms the occurrence of this defect in nature. The three diagnostic OH bands can be used as a signature of H associated with boron substitution in olivine and forsterite, leading to a quantitative analysis of their contribution to H-defects.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Ingrin, Jannick and Kovács, István János and Deloule, Etienne and Balan, Etienne and Blanchard, Marc and Kohn, Simon C. and Hermann, Joerg (2014) Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine. American Mineralogist, 99 (10). pp. 2138-2144. ISSN 0003-004X
Kapcsolat:
10.2138/am-2014-5049
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