Single-crystal X-ray diffraction, EMPA, FTIR and X-ray photoelectron spectroscopy study of narsarsukite from Murun Massif, Russia

Torna indietro

Abstract

A crystal chemical study of narsarsukite from the Murun alkaline massif, Russia has been carried out combining single crystal X-ray diffraction, electron microprobe analyses, micro-Fourier Transform infrared spectroscopy and X-ray photoelectron spectroscopy. The narsarsukite single crystals are tetragonal (space group I4/m) with unit cell parameters: 10.7140(1)  a  10.7183(2) Å and 7.9478(1)  c  7.9511(1) Å. The XPS analysis showed that Fe occurs in the mineral as Fe3+, whereas the FTIR spectrum evidenced that the studied sample is anhydrous. The Murun narsarsukite has average crystal chemical formula: Na2.04K0.01(V5+0.01Ti0.74Zr0.01Al0.01Fe3+0.22Mg0.01)1.00Si4.00(O10.74F0.23OH0.03) 11.00. Structural disorder at octahedral and interstitial sites was modeled and discussed also in consideration of the main substitutional mechanism Ti4+ + O2- ⟷ Fe3+ + (F-, OH-) active in the structure of the mineral.

Autore Pugliese

Tutti gli autori

  • KANEVA E.;SCHINGARO E.;MESTO E.;SCORDARI F.;LACALAMITA M.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2017

ISSN

0026-461X

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile