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Rez4Si7, first in a new MoSi2-based family of 14-electron phases

Fredrickson, Daniel C. ; Boström, Magnus ; Grin, Yuri and Lidin, Sven LU (2009) In Chemistry - A European Journal 15(33). p.8108-8112
Abstract

A study was conducted to investigate the geometrical and electronic connections of Re4Si7 to the rich structural chemistry of the Nowotny Chimmney Ladder phases (NCL). Re4Si7 was prepared by arc-melting a pressed pellet of Re and Si in a stoichiometric ratio, sealing the resulting globule in an excavating quartz tube, and annealing the sample in a muffle furnace. It was found that NCLs were intermetallic compounds of composition TE2-X where T was the transition metal and E the main-group element. The NCLs formed defect variants of another transition-metal disilicide structure type similar to TiSi2. These phases also exhibited complex crystal structures resulting from... (More)

A study was conducted to investigate the geometrical and electronic connections of Re4Si7 to the rich structural chemistry of the Nowotny Chimmney Ladder phases (NCL). Re4Si7 was prepared by arc-melting a pressed pellet of Re and Si in a stoichiometric ratio, sealing the resulting globule in an excavating quartz tube, and annealing the sample in a muffle furnace. It was found that NCLs were intermetallic compounds of composition TE2-X where T was the transition metal and E the main-group element. The NCLs formed defect variants of another transition-metal disilicide structure type similar to TiSi2. These phases also exhibited complex crystal structures resulting from relaxations in the E sublattice in response to the missing E atoms in the stoichiometry. This led to the formation of a significant variety of E atom helices whose helical repeat periods changed continuously with variations in x relative to the T atom sublattice.

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author
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publishing date
type
Contribution to journal
publication status
published
keywords
Bond theory, Electron loealizabilily indicator, Inlermelallic phases, Solid-state structures, Transition-metal silicides
in
Chemistry - A European Journal
volume
15
issue
33
pages
5 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:68949091859
ISSN
0947-6539
DOI
10.1002/chem.200900739
language
English
LU publication?
no
id
54253dff-3851-4a80-9040-d51378daabb6
date added to LUP
2019-04-08 15:02:46
date last changed
2022-04-02 07:46:15
@article{54253dff-3851-4a80-9040-d51378daabb6,
  abstract     = {{<p>A study was conducted to investigate the geometrical and electronic connections of Re<sub>4</sub>Si<sub>7</sub> to the rich structural chemistry of the Nowotny Chimmney Ladder phases (NCL). Re<sub>4</sub>Si<sub>7</sub> was prepared by arc-melting a pressed pellet of Re and Si in a stoichiometric ratio, sealing the resulting globule in an excavating quartz tube, and annealing the sample in a muffle furnace. It was found that NCLs were intermetallic compounds of composition TE<sub>2-X</sub> where T was the transition metal and E the main-group element. The NCLs formed defect variants of another transition-metal disilicide structure type similar to TiSi<sub>2</sub>. These phases also exhibited complex crystal structures resulting from relaxations in the E sublattice in response to the missing E atoms in the stoichiometry. This led to the formation of a significant variety of E atom helices whose helical repeat periods changed continuously with variations in x relative to the T atom sublattice.</p>}},
  author       = {{Fredrickson, Daniel C. and Boström, Magnus and Grin, Yuri and Lidin, Sven}},
  issn         = {{0947-6539}},
  keywords     = {{Bond theory; Electron loealizabilily indicator; Inlermelallic phases; Solid-state structures; Transition-metal silicides}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{33}},
  pages        = {{8108--8112}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Chemistry - A European Journal}},
  title        = {{Re<sub>z4</sub>Si<sub>7</sub>, first in a new MoSi<sub>2</sub>-based family of 14-electron phases}},
  url          = {{http://dx.doi.org/10.1002/chem.200900739}},
  doi          = {{10.1002/chem.200900739}},
  volume       = {{15}},
  year         = {{2009}},
}