Complex Fluorides with Perovskite Structure: Thermal Analyses, Calorimetry, and Infrared Spectra

1972 ◽  
Vol 50 (10) ◽  
pp. 1529-1530 ◽  
Author(s):  
K. C. Patil ◽  
E. A. Secco
Keyword(s):  
Thermal Decomposition ◽  
Infrared Spectra ◽  
Perovskite Structure ◽  
Thermal Analyses ◽  
Infrared Spectral ◽  
Complex Fluorides

Thermal decomposition and infrared spectral results are reported for complex fluorides of the type NH4MF3 where M = Cd, Zn, Cu, Ni, Co, Mn.

Metal Halide Ammines. III. Thermal Analyses and Calorimetry of Fluorosilicate Ammines and Hydrates of Bivalent Metals. Infrared Spectra of the Ammines

1975 ◽  
Vol 53 (16) ◽  
pp. 2426-2429 ◽  
Author(s):  
Kashinath C. Patil ◽  
Etalo A. Secco
Keyword(s):  
Spectral Data ◽  
Infrared Spectra ◽  
Thermal Analyses ◽  
Calorimetric Data ◽  
Ammonia Loss ◽  
Bivalent Metal ◽  
Decomposition Reactions ◽  
Infrared Spectral ◽  
Bivalent Metals ◽  
And Calorimetry

Bivalent metal fluorosilicate ammines have been prepared. The thermal analyses of the dodecammines reveal the decomposition to occur via the pentammine and/or tetrammine. The final ammonia loss is concomitant with fluorosilicate decomposition. Calorimetric data are given for the decomposition reactions. Some fluorosilicate hydrates are included for comparison purposes.The infrared spectral data of the ammines are presented with their assignments.

Metal Halide Ammines. II. Thermal Analyses, Calorimetry and Infrared Spectra of Fluoride Ammines and Hydrates of Bivalent Metals

1972 ◽  
Vol 50 (4) ◽  
pp. 567-573 ◽  
Author(s):  
K. C. Patil ◽  
E. A. Secco
Keyword(s):  
Spectral Data ◽  
Infrared Spectra ◽  
Thermal Analyses ◽  
Metal Halide ◽  
Metal Fluoride ◽  
Bivalent Metal ◽  
Calorimetric Measurements ◽  
Infrared Spectral ◽  
Bivalent Metals ◽  
Experimental Values

Thermal analyses of bivalent metal fluoride ammines reveal that decomposition occurs in two or more steps. Calorimetric measurements along with related enthalpic values of the various decomposition steps are given.The infrared spectral data of the ammines and hydrates are compared with theoretical and some experimental values already in the literature.

Metal Halide Ammines. 1. Thermal Analyses, Calorimetry, and Infrared Spectra of Cadmium Halide (Cl, Br, I) Derivatives

1971 ◽  
Vol 49 (23) ◽  
pp. 3831-3835 ◽  
Author(s):  
K. C. Patil ◽  
E. A. Secco
Keyword(s):  
Spectral Data ◽  
Infrared Spectra ◽  
Thermal Analyses ◽  
Decomposition Reaction ◽  
Metal Halide ◽  
Calorimetric Measurements ◽  
Infrared Spectral

The thermal analyses of cadmium halide hexammines reveal that decomposition occurs by loss of ammonia via the diammine and the monoammine. Calorimetric measurements along with related enthalpic values for the intermediate stable stages of the decomposition reaction are given.The infrared spectral data of the diammines and monoammines are presented with their assignments.

Studies on metal hydroxy compounds. X. Thermal analyses, decomposition kinetics, and infrared spectra of lead halide (Cl, Br, I) derivatives

1970 ◽  
Vol 48 (16) ◽  
pp. 2617-2622 ◽  
Author(s):  
P. Ramamurthy ◽  
E. A. Secco ◽  
M. Badri
Keyword(s):  
Infrared Spectra ◽  
Rate Equation ◽  
Thermal Analyses ◽  
Decomposition Reaction ◽  
Diffusion Type ◽  
Type Rate ◽  
Hydroxy Compounds ◽  
Kinetics Of ◽  
Lead Halide ◽  
Order Rate Equation

The thermal analyses, thermogravimetry (TG), and differential thermal analysis (DTA) of PbOHCl, PbOHBr, and PbOHI reveal that the initial mode of decomposition is via dehydroxylation. Calorimetric measurements along with related enthalpy values for the decomposition reaction are given.The infrared spectra of these compounds are interpreted in terms of folded bands of (PbOH+)n tied together by halide ions consistent with their crystal structures.The kinetics of thermal decomposition of lead hydroxyhalides follow a diffusion-type rate equation which is in contrast to the simple first-order rate equation observed for most Cd, Zn, and Cu compounds. These two distinct rates are interpreted in terms of mobile OH or H species in the dehydroxylation step.

Thermal decomposition of ktn gel and formation of perovskite structure KTN

1997 ◽  
Vol 195 (1) ◽  
pp. 5-10 ◽  
Author(s):  
Shimin Wang ◽  
Jianhong Zhao ◽  
Taosheng Zhou ◽  
Longhai Wang ◽  
Anxiang Kuang
Keyword(s):  
Thermal Decomposition ◽  
Perovskite Structure

Closure Effects on Infrared Spectral Library Search Performance

1987 ◽  
Vol 41 (8) ◽  
pp. 1298-1302 ◽  
Author(s):  
P. B. Harrington ◽  
T. L. Isenhour
Keyword(s):  
Infrared Spectra ◽  
Analytical Method ◽  
Unit Vector ◽  
Search Performance ◽  
Spectral Library ◽  
Data Set ◽  
Library Search ◽  
Vector Length ◽  
Infrared Spectral ◽  
Noise Frequency

Closure is caused by normalization of a data set, and it affects any multivariate analytical method applied to that data set. Two common methods of normalizing infrared spectra (IR), to unit maximum absorbance and to unit vector length, are evaluated by measurement of library search performance. Search performance is evaluated, by the use of the Quantitative Reliability Metric (QRM), as a function of noise frequency and noise level.

Herstellung von CuTa2O6 - von der Trirutil- zur Perowskit-Struktur / Preparation of CuTa2O6 - from the Trirutile to the Perovskite Structure

1996 ◽  
Vol 51 (11) ◽  
pp. 1605-1610 ◽  
Author(s):  
I. Krabbes ◽  
H. Langbein
Keyword(s):  
Thermal Decomposition ◽  
Perovskite Structure ◽  
Unit Cell ◽  
Cooling Process ◽  
Orthorhombic Distortion ◽  
Oxalate Precursor ◽  
Freeze Dried ◽  
C Decomposition ◽  
Perovskite Unit Cell

A new trirutile MTa2O6 was synthesized by thermal decomposition of a freeze dried Cu- Ta-oxalate precursor. Its formation takes place preferentially starting from Cu-rich precursor compositions. Above 1000°C decomposition leads to the already known perovskite like structure with a composition Cu1.05Ta1.98O6 . The degree of the orthorhombic distortion of the perovskite unit cell depends on the conditions during the cooling process after perovskite formation.

Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

1968 ◽  
Vol 46 (2) ◽  
pp. 257-265 ◽  
Author(s):  
K. C. Patil ◽  
G. V. Chandrashekhar ◽  
M. V. George ◽  
C. N. R. Rao
Keyword(s):  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Differential Thermal Analysis ◽  
Rare Earth ◽  
Thermogravimetric Analysis ◽  
Infrared Spectra ◽  
Metal Acetate ◽  
Preliminary Results

The infrared spectra of rare earth acetates have been studied to examine the metal-acetate bonding. The thermal decomposition of rare earth acetates as well as lead and copper acetates have been investigated in detail by employing thermogravimetric analysis and differential thermal analysis. Thermal decomposition of calcium dicarboxylates (malonate to sebacate) have been studied employing t.g.a. and d.t.a. Infrared spectra of the dicarboxylates have also been studied. Preliminary results on the products of decomposition of dicarboxylates have been reported.

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