Structures of glycinium phosphite and glycylglycinium phosphite

Averbuch-Pouchot, Μ. Τ.

doi:10.1107/s0108270192010771

Cited by 75 publications

(43 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The spontaneous polarization (Ps ) appears along the b-axis below 224.7 K. The temperature dependence of Ps is characteristic of the phase transition close to tricritical point. As it results from X-ray investigations [2] the crystal structure is built of infinite chains of hydrogen bonded phosphite anions directed along the crystallographic c-axis. Two types of symmetrical disordered hydrogen bonds of the length 2.482 and 2.518 Α exist in the room temperature phase.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Dispersion in Ferroelectric Glycine Phosphite

et al. 1997

View full text Add to dashboard Cite

Dielectric dispersion in ferroelectric hydrogen bonded glicyne phosphite crystal was investigated in the frequency range 100 Hz -27 GHz. Dielectric relaxation of Debye type observed in the paraelectric phase shows a critical slowing down of the polarization fluctuations. The relaxation frequency decreases with temperature according to fs = 0.305(Τ -Τ0) GHz in the paraelectric phase. The activation energy for flipping dipole motion ΔU = 2.07kΤc confirms order-disorder character of the phase transition. In the ferroelectric phase pronounced low frequency (100 Hz -1 MHz) dispersion related to domain contribution to permittivity was found.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric Dispersion in Ferroelectric Glycine Phosphite

et al. 1997

View full text Add to dashboard Cite

show abstract

“…1, b, органический (L-Hist) и неорганиче-ский (H 3 PO 3 ) компоненты в виде тетраэдров образуют в структуре гистидинфосфита слои, параллельные плоскости (100). В отличие от кристаллических соединений других аминокислот с фосфористой кислотой, например бетаинфосфита и глицинфосфита [13,14], тет-раэдры HPO 3 не связываются друг с другом и не образуют це-почек с водородными связями. Цепочки, параллельные оси второ-…”

Section: поступило в редакцию 3 августа 2017 гunclassified

Упругие и пьезоэлектрические параметры кристаллов гистидинфосфита L-Hist·H-=SUB=-3-=/SUB=-РО-=SUB=-3-=/SUB=-, полученные методом электромеханического резонанса

Балашова¹,

Кричевцов²,

Попов³

et al. 2018

Письма В Журнал Технической Физики

View full text Add to dashboard Cite

Single crystals of L -histidine phosphite ( L -Hist · H_3РО_3) have been grown from aqueous solution by slow cooling method. The results of elemental analysis, of X-ray-diffraction studies of the crystal structure, and the habitus of the obtained crystals are given. The elastic and piezoelectric coefficients have been measured on the plates with the (010) natural faces by the method of electromechanical resonance for stretching vibrations in the temperature range 295–340 K. Elastic compliance values s _33 and s _22 and the corresponding elastic-moduli values, piezoelectric coefficients d _23 and d _22, coefficients of electromechanical coupling, and temperature coefficient of the resonance frequency are obtained. A comparison is given with other crystals, which are compounds of amino acids with phosphorous or phosphoric acid.

show abstract

“…• contains four molecular units [1]. The hydrogen bonds linking the phosphite groups are symmetric (with hydrogens equally disordered over two sites).…”

Section: Cooh]mentioning

confidence: 99%

“…Investigation of symmetry and structure of crystal in the ferroelectric phase (below temperature of the second order phase transition T c = 224.7 K) was recently performed by means of X-ray structure analysis [2] and neutron diffraction study [3]. The space group of this phase is P2 1 . Spontaneous polarization appears along the b-axis and is perpendicular to the direction of the chains of hydrogen bonds (the c-axis).…”

Section: Cooh]mentioning

confidence: 99%

Proton Ordering Model of Phase Transitions in Hydrogen Bonded Ferrielectric Type Systems: The Gpi Crystal

Stasyuk¹,

Czapla²,

Dacko³

et al. 2003

Condens. Matter Phys.

View full text Add to dashboard Cite

A microscopic model based on the consideration of the proton ordering is proposed for describing the H-bonded ferroelectric crystalline systems with a complex structure of the hydrogen bond network. The model has been used for the investigation of thermodynamics and dielectric properties of the GPI crystal. The symmetry analysis of the order parameters responsible for the mixed (ferro-and antiferroelectric) nature of ordering is performed within the model. The phase transition into the ferroelectric state is described. Changes in the dielectric susceptibility of the crystal are studied in the presence of the transverse external electric field acting along the caxis. The results of measurements of temperature and field dependences of dielectric permittivity ε c in the paraelectric phase are presented. The microscopic mechanism of the observed effects is discussed based on the comparison of theoretical results and experimental data. A conclusion is made about the significant role of the ionic groups connected by hydrogen bonds in the charge transfer. So they make an important contribution into the polarizability of the GPI crystal along the direction of H-bonded chains.

show abstract

Structures of glycinium phosphite and glycylglycinium phosphite

Cited by 75 publications

References 2 publications

Dielectric Dispersion in Ferroelectric Glycine Phosphite

Dielectric Dispersion in Ferroelectric Glycine Phosphite

Упругие и пьезоэлектрические параметры кристаллов гистидинфосфита L-Hist·H-=SUB=-3-=/SUB=-РО-=SUB=-3-=/SUB=-, полученные методом электромеханического резонанса

Proton Ordering Model of Phase Transitions in Hydrogen Bonded Ferrielectric Type Systems: The Gpi Crystal

Contact Info

Product

Resources

About

Structures of glycinium phosphite and glycylglycinium phosphite

Cited by 75 publications

References 2 publications

Dielectric Dispersion in Ferroelectric Glycine Phosphite

Dielectric Dispersion in Ferroelectric Glycine Phosphite

Упругие и пьезоэлектрические параметры кристаллов гистидинфосфита L-Hist&#183;H-=SUB=-3-=/SUB=-РО-=SUB=-3-=/SUB=-, полученные методом электромеханического резонанса

Proton Ordering Model of Phase Transitions in Hydrogen Bonded Ferrielectric Type Systems: The Gpi Crystal

Contact Info

Product

Resources

About

Упругие и пьезоэлектрические параметры кристаллов гистидинфосфита L-Hist·H-=SUB=-3-=/SUB=-РО-=SUB=-3-=/SUB=-, полученные методом электромеханического резонанса