The crystal structure of CdAs2

Červinka, Ladislav; Hrubý, A.

doi:10.1107/s0567740870002650

Cited by 37 publications

(16 citation statements)

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“…From an analogous reaction with starting elements Na, Cs, Cd, and As, Cs 4 CdAs 14 was initially identified, together with Cs 8 Cd 18 As 28 [31], NaCd 4 As 3 [26], and CdAs 2 [32]. The differentiation from the other phases was possible due to the red color and transparent habit of the crystals.…”

Section: Methodsmentioning

confidence: 99%

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

Tyson

Bobev

2011

Crystals

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Section: Methodsmentioning

confidence: 99%

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

Tyson

Bobev

2011

Crystals

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“…The exchange of the mineralizer from CdI 2 to another mineralizer like CuCl 2 resulted in completely different products. Cd 3 P 2 and crystals of LiP 15 have been identied aer phase analysis. Impurities of copper or chlorine were neither detected in Cd 3 P 2 nor in LiP 15 fractions.…”

Section: Synthesismentioning

confidence: 99%

Low-activated Li-ion mobility and metal to semiconductor transition in CdP₂@Li phases

et al. 2015

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Solids with high ion mobility are of broad interest for energy storage applications. New systems featuring low-activated ion mobility are important to improve the performance in such systems. Herein we report on a model system dealing with such improved properties. Li 0.2 CdP 2 was synthesized from the elements, lithium as structure stabilizer and CdI 2 as reaction promoters in sealed silica ampoules at 823 K. It crystallizes tetragonal, in space group I4 1 22 (a-CdAs 2 structure type), with lattice parameters a ¼ 7.6691(8)Å, c ¼ 4.4467(4)Å and V ¼ 261.53(4)Å 3 . After 24 h of storage in air lithium ions can be removed in a spontaneous delithiation reaction resulting in Li(OH)$H 2 O formation on the surface of the crystals. Formed a 0 -CdP 2 adopts the a-CdAs 2 structure type. Both compounds consist of isolated cadmium atoms and helical 1 N [P À ]-chains generating empty channels suitable to accommodate Li ions. The heavy atom structure was determined by X-ray diffraction methods while a full model including lithium was derived from a combined solid state NMR and quantum chemical calculation approach. An low activation barrier range in the order of 0.1 to 0.2 eV was determined by NMR spectroscopy pointing towards an extraordinary high Li mobility in Li 0.2 CdP 2 . Of course a Cd-based solid will have certain disadvantages like toxicity and mass for storage applications but substitution of Cd by suitable lighter elements can solve this issue.

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“…The Cd-As distances vary in the range of 2.62-2.97 A > . These values exceed the normal range of the Cd-As separation in binary phases (2.53-2.58 A > in Cd As (14) and 2.59 A > in CdAs (15)), as well as in cadmium arsenide halides that contain As-As pairs. In arsenide halides, such pairs are surrounded by six cadmium atoms forming As Cd octahedra, the As-As distances ranging from 2.36 A > in Cd As I (8) to 2.40 A > in Cd AsCl (9).…”

Section: Resultsmentioning

confidence: 70%

Cd8As7Cl: A Novel Pnictidohalide with a New Structure Type

Shevelkov

Reshetova

Popovkin

1997

Journal of Solid State Chemistry

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The crystal structure of CdAs2

Cited by 37 publications

References 1 publication

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

Low-activated Li-ion mobility and metal to semiconductor transition in CdP₂@Li phases

Cd8As7Cl: A Novel Pnictidohalide with a New Structure Type

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The crystal structure of CdAs2

Cited by 37 publications

References 1 publication

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

New Compounds with [As7]3– Clusters: Synthesis and Crystal Structures of the Zintl Phases Cs2NaAs7, Cs4ZnAs14 and Cs4CdAs14

Low-activated Li-ion mobility and metal to semiconductor transition in CdP2@Li phases

Cd8As7Cl: A Novel Pnictidohalide with a New Structure Type

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Low-activated Li-ion mobility and metal to semiconductor transition in CdP₂@Li phases