메뉴 건너뛰기




Volumn 46, Issue 21, 2007, Pages 8690-8697

Structure and properties of Gd3Ge4: The orthorhombic RE3Ge4 structures revisited (RE = Y, Tb-Tm)

Author keywords

[No Author keywords available]

Indexed keywords


EID: 35649012760     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic7009034     Document Type: Article
Times cited : (22)

References (77)
  • 32
    • 35648963777 scopus 로고    scopus 로고
    • SMART NT, version 5.63; Bruker Analytical X-ray Systems, Inc, Madison, WI, 2003
    • (a) SMART NT, version 5.63; Bruker Analytical X-ray Systems, Inc.: Madison, WI, 2003.
  • 33
    • 35648987274 scopus 로고    scopus 로고
    • SAINT NT, version 6.45; Bruker Analytical X-ray Systems, Inc, Madison, WI, 2003
    • (b) SAINT NT, version 6.45; Bruker Analytical X-ray Systems, Inc.: Madison, WI, 2003.
  • 34
    • 35648940380 scopus 로고    scopus 로고
    • SADABS NT, version 2.10; Bruker Analytical X-ray Systems, Inc, Madison, WI, 2001
    • (a) SADABS NT, version 2.10; Bruker Analytical X-ray Systems, Inc.: Madison, WI, 2001.
  • 35
    • 35648991022 scopus 로고    scopus 로고
    • SHELXTL, version 6.12; Bruker Analytical X-ray Systems, Inc, Madison, WI, 2001
    • (b) SHELXTL, version 6.12; Bruker Analytical X-ray Systems, Inc.: Madison, WI, 2001.
  • 36
    • 77953711329 scopus 로고    scopus 로고
    • This atom occupies the site with symbol Wyckoff 4a (coordinates 0, 0, 0) and is labeled herein as Gel. We point out that the use of STRUCTURE TIDY (Gelato, L. M, Parthe, E. J. Appl. Crystallogr. 1987, 20, 139) to standardize the coordinates interchanges the labels of Ge1 and Ge3 from the older literature
    • This atom occupies the site with symbol Wyckoff 4a (coordinates 0, 0, 0) and is labeled herein as Gel. We point out that the use of STRUCTURE TIDY (Gelato, L. M.; Parthe, E. J. Appl. Crystallogr. 1987, 20, 139) to standardize the coordinates interchanges the labels of Ge1 and Ge3 from the older literature.
  • 41
    • 35648937677 scopus 로고    scopus 로고
    • The revised atomic coordinates and bond distances for the isostructural RE3Ge4 compounds (RE, Y, Tb-Tm) are provided as Supporting Information. The crystallographic information files (CIF) have also been deposited with Fachinformationszentrum Karlsruhe [76344 Eggenstein-Leopoldshafen, Germany; fax: (49) 7247-808-666; email: crysdata@fiz.karlsruhe.de; depository numbers CSD-418019 (Tb3Ge 4, CSD-418020 (Dy3Ge4, CSD-418021 (Ho 3Ge4, CSD-418022 (Er3Ge4, CSD-418023 (Tm3Ge4, and CSD-418028 Y3Ge 4
    • 4).
  • 56
    • 35649013898 scopus 로고    scopus 로고
    • Because the GdGe structure is not completely refined, a more accurate comparison is not possible; we also note that there are more than three sets of different unit cell constants at room temperature, see ref 19 or Tharp, A. G, Smith, G. S, Johnson, Q. Acta Crystallogr. 1966, 20, 583
    • Because the GdGe structure is not completely refined, a more accurate comparison is not possible; we also note that there are more than three sets of different unit cell constants at room temperature, see ref 19 or Tharp, A. G.; Smith, G. S.; Johnson, Q. Acta Crystallogr. 1966, 20, 583.
  • 66
    • 35648964310 scopus 로고    scopus 로고
    • Because of the symmetry reduction and the resultant close separation between the symmetry-equivalent Ge1 atoms in this model, Ge1 has to be treated with 50% occupancy (Figure 3, This may be envisioned as either breaking the chains along the crystallographic a-axis (a scenario depicted in Figure 3) or by having infinite chains along the a-axis that bridge the GdGe slabs on either their left or their right side refer to Figure 2 for directions, Both schemes, in principle, may result in full or partial order in any direction, but since the experimental data do not corroborate such hypothesis, an entirely statistical distribution is assumed
    • Because of the symmetry reduction and the resultant close separation between the symmetry-equivalent Ge1 atoms in this model, Ge1 has to be treated with 50% occupancy (Figure 3). This may be envisioned as either breaking the chains along the crystallographic a-axis (a scenario depicted in Figure 3) or by having infinite chains along the a-axis that bridge the GdGe slabs on either their left or their right side (refer to Figure 2 for directions). Both schemes, in principle, may result in full or partial order in any direction, but since the experimental data do not corroborate such hypothesis, an entirely statistical distribution is assumed.
  • 74
    • 35649000147 scopus 로고    scopus 로고
    • 4 (RE = Gd-Tm).
    • 4 (RE = Gd-Tm).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.