Real-time X-ray powder diffraction investigations on cocoa butter. I. temperature-dependent crystallization behavior

ABSTRACTThe compounds La1−xBaxTiO3 (0 ≤ × ≤ 1) have been prepared by arc melting stoichiometric amounts of LaTiO3 and BaTiO3. Single phase samples can be made for the entire stoichiometry range. The polycrystalline samples have been characterized by thermal gravimetric analysis, X-ray powder diffraction, and temperature dependent magnetic susceptibility. This series of compounds has been studied as a possible candidate for an early transition metal superconductor.

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Mechanisms of mechanochemical salt formation by in situ real time X-ray powder diffraction

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273316094249 ◽

2016 ◽

Vol 72 (a1) ◽

pp. s394-s394

Author(s):

Adam A. L. Michalchuk ◽

Ivan A. Tumanov ◽

Simon A. J. Kimber ◽

Elena V. Boldyreva ◽

Colin R. Pulham

Keyword(s):

Real Time ◽

Powder Diffraction ◽

Salt Formation ◽

X Ray

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Thermal behaviour and kinetics of dehydration of gypsum in air from in situ real-time laboratory parallel-beam X-ray powder diffraction

Physics and Chemistry of Minerals ◽

10.1007/s00269-008-0285-8 ◽

2009 ◽

Vol 36 (7) ◽

pp. 391-402 ◽

Cited By ~ 42

Author(s):

Paolo Ballirano ◽

Elisa Melis

Keyword(s):

Real Time ◽

Thermal Behaviour ◽

Powder Diffraction ◽

Parallel Beam ◽

X Ray ◽

Kinetics Of

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A temperature-dependent powder diffraction study of chromium lanthanum nitrate, LaCr(NO3)6·12H2O

Powder Diffraction ◽

10.1017/s0885715600010782 ◽

2000 ◽

Vol 15 (1) ◽

pp. 23-25 ◽

Cited By ~ 6

Author(s):

A.-E. Gobichon ◽

J.-P. Auffrédic ◽

D. Louër

Keyword(s):

Thermal Decomposition ◽

Nitric Acid ◽

Acid Solution ◽

Powder Diffraction ◽

Cubic Phase ◽

Temperature Dependent ◽

Space Group ◽

X Ray ◽

Reaction Atmosphere ◽

New Phase

The new phase LaCr(NO3)6·12H2O was synthesized from a nitric acid solution. The symmetry is trigonal with the parameters a=10.9564(4) Å and c=16.835(1) Å [V=1750.2(2) Å3, space group R-3]. The thermal decomposition, studied by temperature-dependent X-ray powder diffraction and thermogravimetry, gave successively the cubic phase LaCr(NO3)6·6H2O [a=12.301(1) Å, space group P213] and the chromate(V) LaCrO4. The reduction of LaCrO4 to LaCrO3 occurred at a temperature depending on the oxygen pressure in the reaction atmosphere.

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The Thermal Decomposition of CeM'2(NO3)6 (M' = K, NH4, Rb) Studied by Temperature-Dependent X-Ray Powder Diffraction

Materials Science Forum ◽

10.4028/www.scientific.net/msf.228-231.335 ◽

1996 ◽

Vol 228-231 ◽

pp. 335-340

Author(s):

N. Guillou ◽

N. Audebrand ◽

M. Louër ◽

J.-P. Auffrédic ◽

D. Louër

Keyword(s):

Thermal Decomposition ◽

Powder Diffraction ◽

Temperature Dependent ◽

X Ray

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Superconductivity and Normal-State Properties of (Y1-x-yZrxCay)Ba2Cu3O7-δ Compounds

Modern Physics Letters B ◽

10.1142/s0217984998001384 ◽

1998 ◽

Vol 12 (28) ◽

pp. 1175-1183 ◽

Cited By ~ 2

Author(s):

I. Gr. Deac ◽

A. V. Pop ◽

V. Pop ◽

R. Tetean ◽

D. Kovacs ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetic Susceptibility ◽

Powder Diffraction ◽

Normal State ◽

Lattice Parameters ◽

Temperature Dependent ◽

Dopant Content ◽

X Ray ◽

Electrical And Magnetic Properties ◽

Normal State Properties

The electrical and magnetic properties of ( Y 1-x-y Zr x Ca y) Ba 2 Cu 3 O 7-δ ceramics are investigated by using resistivity, ac and dc susceptibility measurements. X-ray powder diffraction has been used to find the lattice parameters of the samples. The samples are orthorhombic, except the sample with x=0.15 and y=0.2 which is tetragonal. All the samples are superconducting. There is no significant change in Tc for the Zr-doped ( Y 1-x Zr x) Ba 2 Cu 3 O 7-δ samples, while for the ( Y 0.85-y Zr 0.15 Ca y) Ba 2 Cu 3 O 7-δ compounds the Tc decrease with the dopant content and they show temperature dependent dc magnetic susceptibility, in the normal state.

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