Phase transitions of polycrystalline [Fe(H2O)6](ClO4)3 and [Cr(H2O)6](ClO4)3 studied by DSC

被引：1

作者：

Mikuli, E

Grad, B

Zaremba, K

Wróbel, S

机构：

[1] Jagiellonian Univ, Fac Chem, Dept Chem Phys, PL-30060 Krakow, Poland

[2] Jagiellonian Univ, M Smoluchowski Inst Phys, Dept Solid State Phys, PL-30059 Krakow, Poland

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2004年 / 76卷 / 03期

关键词：

DSC; FT-IR; FT-RS; hexaaquachromium(III) chlorate(VII); hexaaquairon(III) chlorate(VII); phase transitions;

D O I：

10.1023/B:JTAN.0000032256.44386.54

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Fourier transform far- and mid-infrared (FT-FIR and FT-MIR) and Fourier transform Raman scattering (FT-RS) spectra of [Fe(H2O)(6)](ClO4)(3) and [Cr(H2O)(6)](ClO4)(3) indicate that these compounds are ionic molecular crystals built from complex cations and complex anions of octahedral (T-h) and tetrahedral (T-d) symmetry, respectively. The thermodynamic parameters for two phase transitions in polycrystalline [Fe(H2O)(6)](ClO4)(3) and [Cr(H2O)(6)](ClO4)(3) were determined by differential scanning calorimetry (DSC): melting of the crystals (at T-m=359.2 and 363.1 K) and solid-solid phase transition (at T-C1=126.5 and 139.4 K), respectively.

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页码：719 / 726

页数：8

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