La-Ni-Si: A Gold Mine with a Diamond

Volodymyr Smetana; Davide Grilli; Vitalii Shtender; Marcella Pani; Pietro Manfrinetti; Anja Verena Mudring

doi:10.1021/acs.inorgchem.4c03560

La-Ni-Si: A Gold Mine with a Diamond

Volodymyr Smetana
, Davide Grilli
, Vitalii Shtender
, Marcella Pani^*
, Pietro Manfrinetti^*
, Anja Verena Mudring^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Abstract

The La-poor part of the ternary La-Ni-Si system has been explored leading to the discovery and structural characterization of four new polar intermetallic compounds. LaNi₅Si₂ [BaAu₅Ga₂ type, oP64, space group Pnma, a = 7.8223(7) Å, b = 6.3894(6) Å, c = 17.843(2) Å, V = 891.8(2) Å³, Z = 8] features a diamond (lonsdaleite)-like homoatomic Ni framework and is the first Ni representative of a larger family of compounds typically formed by aurides. La₂Ni₈Si₃ [Eu₂Ni₈Si₃ type, tP52, P4₂/nmc, a = 10.0278(3) Å, c = 7.5047(4) Å, V = 754.65(6) Å³, Z = 4] is characterized by homoatomic Ni₄ tetrahedra and rectangles. LaNi₅Si₃ [SrNi₅P₃ type, oS36, Cmcm, a = 3.722(2) Å, b = 11.759(5) Å, c = 11.622(3) Å, V = 508.7(3) Å³, Z = 4] is governed by extensive heteroatomic bonding and characterized by homopolyhedral packing. La₃Ni₄Si₂ [Ce₃Ni₄Si₂ type, mC36, C2/c, a = 15.819(1) Å, b = 6.0068(5) Å, c = 7.4918(6) Å, β = 103.163(5)°, V = 693.17(10) Å³, Z = 4] is a new member of homologous series that includes La₃Ni₃Si₂ and La₃Ni_3.5Si₂. We conclude that the similar radii and electronegativities of Ni and Si are the reason for the incredible diversity of compositions and structures in this system.

Original language	English
Journal	Inorganic Chemistry
Volume	63
Issue	48
Pages (from-to)	22761-22770
Number of pages	10
ISSN	0020-1669
DOIs	https://doi.org/10.1021/acs.inorgchem.4c03560
Publication status	Published - 2 Dec 2024

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@article{5bff0141b6624cf69a40473dd68adfea,

title = "La-Ni-Si: A Gold Mine with a Diamond",

abstract = "The La-poor part of the ternary La-Ni-Si system has been explored leading to the discovery and structural characterization of four new polar intermetallic compounds. LaNi5Si2 [BaAu5Ga2 type, oP64, space group Pnma, a = 7.8223(7) {\AA}, b = 6.3894(6) {\AA}, c = 17.843(2) {\AA}, V = 891.8(2) {\AA}3, Z = 8] features a diamond (lonsdaleite)-like homoatomic Ni framework and is the first Ni representative of a larger family of compounds typically formed by aurides. La2Ni8Si3 [Eu2Ni8Si3 type, tP52, P42/nmc, a = 10.0278(3) {\AA}, c = 7.5047(4) {\AA}, V = 754.65(6) {\AA}3, Z = 4] is characterized by homoatomic Ni4 tetrahedra and rectangles. LaNi5Si3 [SrNi5P3 type, oS36, Cmcm, a = 3.722(2) {\AA}, b = 11.759(5) {\AA}, c = 11.622(3) {\AA}, V = 508.7(3) {\AA}3, Z = 4] is governed by extensive heteroatomic bonding and characterized by homopolyhedral packing. La3Ni4Si2 [Ce3Ni4Si2 type, mC36, C2/c, a = 15.819(1) {\AA}, b = 6.0068(5) {\AA}, c = 7.4918(6) {\AA}, β = 103.163(5)°, V = 693.17(10) {\AA}3, Z = 4] is a new member of homologous series that includes La3Ni3Si2 and La3Ni3.5Si2. We conclude that the similar radii and electronegativities of Ni and Si are the reason for the incredible diversity of compositions and structures in this system.",

author = "Volodymyr Smetana and Davide Grilli and Vitalii Shtender and Marcella Pani and Pietro Manfrinetti and Mudring, \{Anja Verena\}",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors. Published by American Chemical Society.",

year = "2024",

month = dec,

day = "2",

doi = "10.1021/acs.inorgchem.4c03560",

language = "English",

volume = "63",

pages = "22761--22770",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "48",

}

TY - JOUR

T1 - La-Ni-Si

T2 - A Gold Mine with a Diamond

AU - Smetana, Volodymyr

AU - Grilli, Davide

AU - Shtender, Vitalii

AU - Pani, Marcella

AU - Manfrinetti, Pietro

AU - Mudring, Anja Verena

PY - 2024/12/2

Y1 - 2024/12/2

N2 - The La-poor part of the ternary La-Ni-Si system has been explored leading to the discovery and structural characterization of four new polar intermetallic compounds. LaNi5Si2 [BaAu5Ga2 type, oP64, space group Pnma, a = 7.8223(7) Å, b = 6.3894(6) Å, c = 17.843(2) Å, V = 891.8(2) Å3, Z = 8] features a diamond (lonsdaleite)-like homoatomic Ni framework and is the first Ni representative of a larger family of compounds typically formed by aurides. La2Ni8Si3 [Eu2Ni8Si3 type, tP52, P42/nmc, a = 10.0278(3) Å, c = 7.5047(4) Å, V = 754.65(6) Å3, Z = 4] is characterized by homoatomic Ni4 tetrahedra and rectangles. LaNi5Si3 [SrNi5P3 type, oS36, Cmcm, a = 3.722(2) Å, b = 11.759(5) Å, c = 11.622(3) Å, V = 508.7(3) Å3, Z = 4] is governed by extensive heteroatomic bonding and characterized by homopolyhedral packing. La3Ni4Si2 [Ce3Ni4Si2 type, mC36, C2/c, a = 15.819(1) Å, b = 6.0068(5) Å, c = 7.4918(6) Å, β = 103.163(5)°, V = 693.17(10) Å3, Z = 4] is a new member of homologous series that includes La3Ni3Si2 and La3Ni3.5Si2. We conclude that the similar radii and electronegativities of Ni and Si are the reason for the incredible diversity of compositions and structures in this system.

AB - The La-poor part of the ternary La-Ni-Si system has been explored leading to the discovery and structural characterization of four new polar intermetallic compounds. LaNi5Si2 [BaAu5Ga2 type, oP64, space group Pnma, a = 7.8223(7) Å, b = 6.3894(6) Å, c = 17.843(2) Å, V = 891.8(2) Å3, Z = 8] features a diamond (lonsdaleite)-like homoatomic Ni framework and is the first Ni representative of a larger family of compounds typically formed by aurides. La2Ni8Si3 [Eu2Ni8Si3 type, tP52, P42/nmc, a = 10.0278(3) Å, c = 7.5047(4) Å, V = 754.65(6) Å3, Z = 4] is characterized by homoatomic Ni4 tetrahedra and rectangles. LaNi5Si3 [SrNi5P3 type, oS36, Cmcm, a = 3.722(2) Å, b = 11.759(5) Å, c = 11.622(3) Å, V = 508.7(3) Å3, Z = 4] is governed by extensive heteroatomic bonding and characterized by homopolyhedral packing. La3Ni4Si2 [Ce3Ni4Si2 type, mC36, C2/c, a = 15.819(1) Å, b = 6.0068(5) Å, c = 7.4918(6) Å, β = 103.163(5)°, V = 693.17(10) Å3, Z = 4] is a new member of homologous series that includes La3Ni3Si2 and La3Ni3.5Si2. We conclude that the similar radii and electronegativities of Ni and Si are the reason for the incredible diversity of compositions and structures in this system.

UR - https://www.scopus.com/pages/publications/85209672286

U2 - 10.1021/acs.inorgchem.4c03560

DO - 10.1021/acs.inorgchem.4c03560

M3 - Journal article

C2 - 39556881

AN - SCOPUS:85209672286

SN - 0020-1669

VL - 63

SP - 22761

EP - 22770

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 48

ER -

La-Ni-Si: A Gold Mine with a Diamond

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