Английская Википедия:Arsenide hydride

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Версия от 23:31, 2 февраля 2024; EducationBot (обсуждение | вклад) (Новая страница: «{{Английская Википедия/Панель перехода}} An '''arsenide hydride''' or '''hydride arsenide''' is a chemical compound containing hydride (H<sup>−</sup>) and arsenide (As<sup>3−</sup>) ions in a single phase. They are in the class of mixed anion compounds. == Preparation == Arsenide hydride compounds may be produced by heating metal hydride and metal arsenide mixtures under pressure.<ref name=":3">{{Cite journal...»)
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An arsenide hydride or hydride arsenide is a chemical compound containing hydride (H) and arsenide (As3−) ions in a single phase. They are in the class of mixed anion compounds.

Preparation

Arsenide hydride compounds may be produced by heating metal hydride and metal arsenide mixtures under pressure.[1]

Properties

Arsenide hydrides are under investigation as unconventional superconductors.[2]

The hydride ions can be replaced by fluoride or oxide ions to yield variations in composition.[3]

Reactions

when heated to 800° CaFeAsH forms three phases.[4]

2CaFeAsH → Ca + CaFe2As2 + H2

name formula form space group unit cell volume density appearance properties reference
LiCa3As2H orthorhombic Pnma a = 11.4064(7) Å, b = 4.2702(3) Å, c = 11.8762 Z=4 red band gap 1.4 eV [5]
Ca14As6C0.5,NH5 tetragonal P4/mbm a = 15.749, c = 9.1062, Z = 4 red band gap 1.6 eV [5]
CaFeAsH tetragonal P4/nmm a = 0.3878 c = 0.8260 superconductor [6]
CaFeAsF1-xHx non superconductor [4]
CaFe1−xCoxAsH tetragonal P4/nmm a increases and c decreases with x superconducting 23 K at x= 0.09 [7]
K2Cr3As3H [8]
K1−δCr3As3Hx x<0.45 Superconductor Tc=5.8 K [9][10]
Lithium tristrontium diarsenide hydride Sr3LiAs2H orthorhombic Pnma a = 12.034, b = 4.4698, c = 12.5907; V = 677.2 Å3 Zintl phase; semiconductor; diamagnetic [11]
LaFeAsO1−xHx (x<0.53) superconductor Tc=36 K with x=0.3 [12]
La2Ti2As2H2.3 tetragonal I4/mmm a=3.9595 c=18.0986 283.742 [13]
La2V2As2Hx tetragonal I4/mmm a=3.9561 c=17.909 280.030 [13]
La2Cr2As2Hx tetragonal I4/mmm a=3.9934 c=17.380 277.17 [13]
La2Mn2As2Hx tetragonal I4/mmm a=4.0556 c=17.46 287.2 [13]
LaMnAsO1−xHx (x=0−0.73) ferromagnetic [3]
CoLaAsH0.78x orthorhombic I41md a=4.1739 c=14.64 254.8 black [14]
NiLaAsH0.69 orthorhombic I41md a=4.1660 c=14.5993 253.37 black [14]
CuLaAsH0.78 orthorhombic I41md a=4.2302 c=14.5780 260.86 7.08 black [14]
LaZn0.5AsHx hexagonal P6/mmm a=4.200 c=4.244 64.81 black [14]
CeFeAsO1−xHx (x<0.5) tetragonal P4/nmm a=3.95386 c=8.5926 at x=0.4 superconducting 0.1 < x < 0.4; Tc=47 K with x=0.25 [12][1]
NdFeAs(O,H) superconductor Tc=40K [15]
SmFeAsO1−xHx (x<0.5) superconductor Tc=55 K at x = 0.2. [4]
Sm2Mn2As2Hx tetragonal I4/mmm a=3.9251 c=16.67 256.7 [13]
GdFeAsO1−xHx [12]

References

Шаблон:Reflist

Шаблон:Arsenides