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1	Author	J. Zaleski, R. Jakubas	Requires cookie*
	Title	The Dielectric and Dilatometric Single Crystal Studies of Phase Transitions in a New Member of Family of Halogenoantimonates(III) [C(NH2)3l2SbCl5* [C(NH2)3]C1
	Abstract	The results of dielectric, dilatometric and DSC studies on a new member of the family of alkylammonium halogenoantimonates ([(C(NH2)3]2SbCl5 • [(C(NH2)3]C1) are presented. This com pound undergoes three phase transitions at 146 K, 162 K, and 366 K. The two low temperature transitions are suggested to be of the displacive type and the high temperature one of the order-dis-order type. The character of temperature changes of the electric permittivity at the lowest temper ature transition suggest a polar phase below the transition temperature.
	Reference	Z. Naturforsch. 49a, 709—713 (1994); received March 23 1994
	Published	1994
	Keywords	Phase transitions, Dielectric, Dilatometric, Halogenoantimonate, Guanidinium
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	TEI-XML for	default:Reihe_A/49/ZNA-1994-49a-0709.pdf
	Identifier	ZNA-1994-49a-0709
	Volume	49

2	Author	G. H., C. A., J. Zaleskia, G. Batorb, R. Jakubasb	Requires cookie*
	Title	D
	Abstract	ie le c tr ic P r o p e r tie s a n d C h a r a c te r is a tio n o f th e S u p e rio n ic P h a s e o f [ C (N H 2) 3]2S b C l 5* [ C (N H 2) 3]C l (GHCA undergoes four phase transitions at Tcl = 402 K, Tc2 = 373 K, Ta = 162 K, and TcA = 146 K. Below Tc3 it possesses pyroelectric properties with the spontaneous polarization vector (Ps) in the ac plane and the maximum along the c axis equal to 8 pC/m2. Dielectric dispersion studies of GHCA show that the main dielectric dispersion connected probably with collective motions of chlorine ions is above 1GHz. For the phase transition at Tc2 to a superionic phase the thermal dilatation and electric conductivity were measured. The anomalies of the electric conductivity at Tc2 and T x were observed with large values of <j(10"3 S/m) above Tcl. The guanidinium cations above Tc2, besides reorientational motions, undergo slow self diffusion.
	Reference	Z. Naturforsch. 50a, 888—892 (1995); received February 20 1995
	Published	1995
	Keywords	Guanidinium, chloroantimonate, phase transition, DSC, dilatometric, pyroelectric, electric conductivity
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	TEI-XML for	default:Reihe_A/50/ZNA-1995-50a-0888.pdf
	Identifier	ZNA-1995-50a-0888
	Volume	50