---
_id: '7076'
abstract:
- lang: eng
  text: Iron is a ubiquitous impurity in metamict (radiation-damaged and partially
    amorphized) materials such as titanite (CaSiTiO5). Using 57Fe Mössbauer spectroscopy
    we find that iron in metamict titanite is partitioned between amorphous and crystalline
    regions based on valence. Trivalent iron exists in the crystalline titanite matrix
    whereas divalent iron exists almost exclusively in radiation-amorphized regions.
    We find that the relative abundances of the oxidation states correlate with the
    volume fraction of amorphous and crystalline regions. Our data also show that
    oxidation of iron proceeds along with the recrystallization of the amorphized
    regions. Recrystallization is confirmed to occur over the range 700 °C < T < 925 °C,
    and no further structural changes are observed at higher temperatures. It is surprising
    that our Mössbauer measurements show divalent iron to be surrounded by titanite
    with a high degree of short-range structural order in the amorphized regions.
    This observation is fundamentally different from other metamict materials such
    as zircon (ZrSiO4), where amorphized regions show no short-range order.
article_number: '105402'
article_processing_charge: No
article_type: original
author:
- first_name: E K H
  full_name: Salje, E K H
  last_name: Salje
- first_name: D J
  full_name: Safarik, D J
  last_name: Safarik
- first_name: R D
  full_name: Taylor, R D
  last_name: Taylor
- first_name: M P
  full_name: Pasternak, M P
  last_name: Pasternak
- first_name: Kimberly A
  full_name: Modic, Kimberly A
  id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
  last_name: Modic
  orcid: 0000-0001-9760-3147
- first_name: L A
  full_name: Groat, L A
  last_name: Groat
- first_name: J C
  full_name: Lashley, J C
  last_name: Lashley
citation:
  ama: 'Salje EKH, Safarik DJ, Taylor RD, et al. Determination of iron sites and the
    amount of amorphization in radiation-damaged titanite (CaSiTiO5). <i>Journal of
    Physics: Condensed Matter</i>. 2011;23(10). doi:<a href="https://doi.org/10.1088/0953-8984/23/10/105402">10.1088/0953-8984/23/10/105402</a>'
  apa: 'Salje, E. K. H., Safarik, D. J., Taylor, R. D., Pasternak, M. P., Modic, K.
    A., Groat, L. A., &#38; Lashley, J. C. (2011). Determination of iron sites and
    the amount of amorphization in radiation-damaged titanite (CaSiTiO5). <i>Journal
    of Physics: Condensed Matter</i>. IOP Publishing. <a href="https://doi.org/10.1088/0953-8984/23/10/105402">https://doi.org/10.1088/0953-8984/23/10/105402</a>'
  chicago: 'Salje, E K H, D J Safarik, R D Taylor, M P Pasternak, Kimberly A Modic,
    L A Groat, and J C Lashley. “Determination of Iron Sites and the Amount of Amorphization
    in Radiation-Damaged Titanite (CaSiTiO5).” <i>Journal of Physics: Condensed Matter</i>.
    IOP Publishing, 2011. <a href="https://doi.org/10.1088/0953-8984/23/10/105402">https://doi.org/10.1088/0953-8984/23/10/105402</a>.'
  ieee: 'E. K. H. Salje <i>et al.</i>, “Determination of iron sites and the amount
    of amorphization in radiation-damaged titanite (CaSiTiO5),” <i>Journal of Physics:
    Condensed Matter</i>, vol. 23, no. 10. IOP Publishing, 2011.'
  ista: 'Salje EKH, Safarik DJ, Taylor RD, Pasternak MP, Modic KA, Groat LA, Lashley
    JC. 2011. Determination of iron sites and the amount of amorphization in radiation-damaged
    titanite (CaSiTiO5). Journal of Physics: Condensed Matter. 23(10), 105402.'
  mla: 'Salje, E. K. H., et al. “Determination of Iron Sites and the Amount of Amorphization
    in Radiation-Damaged Titanite (CaSiTiO5).” <i>Journal of Physics: Condensed Matter</i>,
    vol. 23, no. 10, 105402, IOP Publishing, 2011, doi:<a href="https://doi.org/10.1088/0953-8984/23/10/105402">10.1088/0953-8984/23/10/105402</a>.'
  short: 'E.K.H. Salje, D.J. Safarik, R.D. Taylor, M.P. Pasternak, K.A. Modic, L.A.
    Groat, J.C. Lashley, Journal of Physics: Condensed Matter 23 (2011).'
date_created: 2019-11-19T13:39:30Z
date_published: 2011-02-21T00:00:00Z
date_updated: 2021-01-12T08:11:43Z
day: '21'
doi: 10.1088/0953-8984/23/10/105402
extern: '1'
intvolume: '        23'
issue: '10'
language:
- iso: eng
month: '02'
oa_version: None
publication: 'Journal of Physics: Condensed Matter'
publication_identifier:
  issn:
  - 0953-8984
  - 1361-648X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Determination of iron sites and the amount of amorphization in radiation-damaged
  titanite (CaSiTiO5)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 23
year: '2011'
...