Direct imaging of icosahedral clusters in a cubic Cd6Ca approximant crystal

Eiji Abe; An Pang Tsai

doi:10.1016/j.jnoncrysol.2003.11.036

Direct imaging of icosahedral clusters in a cubic Cd₆Ca approximant crystal

Eiji Abe, An Pang Tsai

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

The structure of a cubic Cd₆Ca crystal, which is constructed by a bcc packing of multiple-shell icosahedral atomic clusters and regarded as a 1/1 approximant to a binary Cd_5.7Ca icosahedral quasicrystal, has been investigated using atomic-resolution annular dark-field scanning transmission electron microscopy (ADF-STEM). Direct imaging of the projected icosahedral clusters reveals no significant ADF-contrast around the cluster center, suggesting that the Cd atoms at the core of the cluster are not located at definite position such as the cubic atomic sites proposed by X-ray analysis, but distributed in a significantly disordered manner.

Original language	English
Pages (from-to)	190-193
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	334-335
DOIs	https://doi.org/10.1016/j.jnoncrysol.2003.11.036
Publication status	Published - 2004 Mar 15
Externally published	Yes
Event	8th International Conference on Quasicrystals - Bangalore, India Duration: 2002 Sep 8 → 2002 Sep 13

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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title = "Direct imaging of icosahedral clusters in a cubic Cd6Ca approximant crystal",

abstract = "The structure of a cubic Cd6Ca crystal, which is constructed by a bcc packing of multiple-shell icosahedral atomic clusters and regarded as a 1/1 approximant to a binary Cd5.7Ca icosahedral quasicrystal, has been investigated using atomic-resolution annular dark-field scanning transmission electron microscopy (ADF-STEM). Direct imaging of the projected icosahedral clusters reveals no significant ADF-contrast around the cluster center, suggesting that the Cd atoms at the core of the cluster are not located at definite position such as the cubic atomic sites proposed by X-ray analysis, but distributed in a significantly disordered manner.",

author = "Eiji Abe and Tsai, {An Pang}",

year = "2004",

month = mar,

day = "15",

doi = "10.1016/j.jnoncrysol.2003.11.036",

language = "English",

volume = "334-335",

pages = "190--193",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

note = "8th International Conference on Quasicrystals ; Conference date: 08-09-2002 Through 13-09-2002",

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TY - JOUR

T1 - Direct imaging of icosahedral clusters in a cubic Cd6Ca approximant crystal

AU - Abe, Eiji

AU - Tsai, An Pang

PY - 2004/3/15

Y1 - 2004/3/15

N2 - The structure of a cubic Cd6Ca crystal, which is constructed by a bcc packing of multiple-shell icosahedral atomic clusters and regarded as a 1/1 approximant to a binary Cd5.7Ca icosahedral quasicrystal, has been investigated using atomic-resolution annular dark-field scanning transmission electron microscopy (ADF-STEM). Direct imaging of the projected icosahedral clusters reveals no significant ADF-contrast around the cluster center, suggesting that the Cd atoms at the core of the cluster are not located at definite position such as the cubic atomic sites proposed by X-ray analysis, but distributed in a significantly disordered manner.

AB - The structure of a cubic Cd6Ca crystal, which is constructed by a bcc packing of multiple-shell icosahedral atomic clusters and regarded as a 1/1 approximant to a binary Cd5.7Ca icosahedral quasicrystal, has been investigated using atomic-resolution annular dark-field scanning transmission electron microscopy (ADF-STEM). Direct imaging of the projected icosahedral clusters reveals no significant ADF-contrast around the cluster center, suggesting that the Cd atoms at the core of the cluster are not located at definite position such as the cubic atomic sites proposed by X-ray analysis, but distributed in a significantly disordered manner.

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U2 - 10.1016/j.jnoncrysol.2003.11.036

DO - 10.1016/j.jnoncrysol.2003.11.036

M3 - Conference article

AN - SCOPUS:1142288416

VL - 334-335

SP - 190

EP - 193

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

T2 - 8th International Conference on Quasicrystals

Y2 - 8 September 2002 through 13 September 2002

ER -