Prediction of a novel 10-fold gold coordinated structure in AuIn2 above 10 GPa

2017 ◽  
Vol 19 (5) ◽  
pp. 3532-3537 ◽  
Author(s):  
P. Modak ◽  
Ashok K. Verma
Keyword(s):  
Structural Transition ◽  
Type Structure

AuIn2 undergoes a structural transition from the CaF2-type to Fe2B-type structure near 10 GPa.

Exploitation of Eu3+ red luminescence through order–disorder structural transitions in lanthanide stannate pyrochlores for warm white LED applications

2018 ◽  
Vol 20 (37) ◽  
pp. 24287-24299 ◽  
Author(s):  
T. S. Sreena ◽  
P. Prabhakar Rao ◽  
Athira K. V. Raj ◽  
T. R. Aju Thara
Keyword(s):  
Structural Transition ◽  
Type Structure ◽  
White Led ◽  
Structural Transitions ◽  
Fluorite Type ◽  
Red Luminescence

The structural transition from an ordered pyrochlore to a fluorite-type structure in Ln2.85YSnNbO10.5:0.15Eu3+ (Ln = La, Gd, Y, and Lu) provides a gateway for exploiting Eu3+ red luminescence for warm white LED applications.

Specific Heat of MnCoGe Type Compounds at Martensitic Phase Transitions

2012 ◽  
Vol 190 ◽  
pp. 331-334 ◽  
Author(s):  
P.E. Markin ◽  
N.V. Mushnikov ◽  
A.V. Proshkin ◽  
S.V. Belyaev
Keyword(s):  
Phase Transitions ◽  
Specific Heat ◽  
Structural Transition ◽  
Elevated Temperatures ◽  
Type Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
First Order ◽  
Martensitic Phase Transitions ◽  
Type Transition

The X-ray diffraction and specific heat measurements have been performed for the ferromagnetic compounds (MnCo)1-xGe within the concentration range 0.02 x 0.035. The compounds possess the hexagonal Ni2In-type structure at elevated temperatures, while for the composition with x = 0.02 and 0.03 a spontaneous martensitic-type transition to the orthorhombic TiNiSi-type phase occurs at 283 and 221 K, respectively. We studied the entropy changes associated with the first-order structural transition and estimated the changes in magnetic, lattice, electronic entropies.

New semiconducting compounds of diamond type structure

Physica ◽  
1954 ◽  
Vol 3 (7-12) ◽  
pp. 1107-1109 ◽  
Author(s):  
C GOODMAN ◽  
R DOUGLAS
Keyword(s):  
Type Structure ◽  
Semiconducting Compounds ◽  
Diamond Type

Study of Natural Minerals of U-Ryrochlore-Type Structure as Analogues of Plutonium Ceramic Waste-form

2002 ◽  
Vol 713 ◽  
Author(s):  
Roman V. Bogdanov ◽  
Yuri F. Batrakov ◽  
Elena V. Puchkova ◽  
Andrey S. Sergeev ◽  
Boris E. Burakov
Keyword(s):  
Chemical Shifts ◽  
Pyrochlore Structure ◽  
Type Structure ◽  
Waste Form ◽  
X Ray ◽  
Ceramic Waste ◽  
Natural Minerals ◽  
The Us ◽  
Pyrochlore Type

ABSTRACTAt present, crystalline ceramic based on titanate pyrochlore, (Ca,Gd,Hf,Pu,U)2Ti2O7, is considered as the US candidate waste form for the immobilization of weapons grade plutonium. Naturally occuring U-bearing minerals with pyrochlore-type structure: hatchettolite, betafite, and ellsworthite, were studied in orders to understand long-term radiation damage effects in Pu ceramic waste forms. Chemical shifts (δ) of U(Lδ1)– and U(Lβ1) – X-ray emission lines were measured by X-ray spectrometry. Calculations were performed on the basis of a two-dimensional δLá1- and δLδ1- correlation diagram. It was shown that 100% of uranium in hatchettolite and, probably, 95-100% of uranium in betafite are in the form of (UO2)2+. formal calculation shows that in ellsworthite only 20% of uranium is in the form of U4+ and 80% of the rest is in the forms of U5+ and U6+. The conversion of the initial U4+ ion originally occurring in the pyrochlore structure of natural minerals to (UO2)2+ due to metamict decay causes a significant increase in uranium mobility.

SEARCH FOR A NEW MANAGEMENT MODEL FOR THE DEVELOPMENT, PRODUCTION AND IMPLEMENTATION OF WORLD-CLASS HYDROGEN TECHNOLOGIES

2020 ◽  
Vol 3 (7) ◽  
pp. 114-119
Author(s):  
V. F. UKOLOV ◽  
◽  
E. N. OZHIGANOV ◽  
Yu. V. RAGULINA ◽  
V. V. ARKHIPOV ◽  
...  
Keyword(s):  
Large Scale ◽  
The State ◽  
Type Structure ◽  
Management Model ◽  
World Class ◽  
Hydrogen Technologies

After the research, the authors came to the conclusion: it is necessary to get a new, interstate platform-type structure for the development, production and large-scale implementation of civil hydrogen technologies for various fields of activity and the state.

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