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Title: Composition, constitution and stability of the synthetic hollandites: A/sub x/M/sub 4-2x/N/sub 2x/O/sub 8/, M=Ti, Ge,Ru,Zr,Sn and N=Al,Sc,Cr,Ga,Ru,In and the system (A,Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb,Cs,Sr

Abstract

Synthetic hollandite compounds of composition Ba/sub x/M(IV)/sub 4-2x/N(III)/sub 2x/O/sub 8/ (M=Ti, Ge, Ru, Zr, Sn; N=Al, Sc, Cr, Ga, Ru, In) and Sr/sub x/M(IV)/sub 4-2x/N(III)/sub 2x/O/sub 8/ (M=Ti, Ge, Ru; N=Al, Cr, Ga) and (A, Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb, Cs, Ca, Sr have been studied by electron and X-ray diffraction and high resolution electron microscopy. They have been found to be stable only within certain ranges of x, depending on the M and N ions. The lower value of x is never less than 0.56, the upper x level is about 0.73. Higher x are correlated with larger radii of M and N. The variation in x gives rise to an incommensurate occupation by the A ions in the tunnels. Correlation among tunnel sequences varies widely, also depending on the nature of the M and N ions. The lower and upper x, the cell dimensions, the correlation between the tunnels and the stability in water at 300/sup 0/C of the existing hollandites are given.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Gorlaeus Labs., State Univ., Leiden, P.O. Box 9502, 2300 RA Leiden
OSTI Identifier:
6478115
Alternate Identifier(s):
OSTI ID: 6478115
Resource Type:
Journal Article
Journal Name:
Mater. Res. Bull.; (United States)
Additional Journal Information:
Journal Volume: 22:4
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HOLLANDITE; CHEMICAL COMPOSITION; STABILITY; CORRELATIONS; ELECTRON DIFFRACTION; ELECTRON MICROSCOPY; HIGH TEMPERATURE; SYNTHETIC MATERIALS; WATER; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; ALUMINIUM OXIDES; BARIUM COMPOUNDS; BARIUM OXIDES; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; HYDROGEN COMPOUNDS; MATERIALS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; TITANIUM COMPOUNDS; TITANIUM OXIDES; TRANSITION ELEMENT COMPOUNDS 400201* -- Chemical & Physicochemical Properties

Citation Formats

Zand, Everstijn, P.L.A., Mijlhoff, F.C., Renes, G.H., and Ijdo, D.J.W. Composition, constitution and stability of the synthetic hollandites: A/sub x/M/sub 4-2x/N/sub 2x/O/sub 8/, M=Ti, Ge,Ru,Zr,Sn and N=Al,Sc,Cr,Ga,Ru,In and the system (A,Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb,Cs,Sr. United States: N. p., 1987. Web.
Zand, Everstijn, P.L.A., Mijlhoff, F.C., Renes, G.H., & Ijdo, D.J.W. Composition, constitution and stability of the synthetic hollandites: A/sub x/M/sub 4-2x/N/sub 2x/O/sub 8/, M=Ti, Ge,Ru,Zr,Sn and N=Al,Sc,Cr,Ga,Ru,In and the system (A,Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb,Cs,Sr. United States.
Zand, Everstijn, P.L.A., Mijlhoff, F.C., Renes, G.H., and Ijdo, D.J.W. Wed . "Composition, constitution and stability of the synthetic hollandites: A/sub x/M/sub 4-2x/N/sub 2x/O/sub 8/, M=Ti, Ge,Ru,Zr,Sn and N=Al,Sc,Cr,Ga,Ru,In and the system (A,Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb,Cs,Sr". United States.
@article{osti_6478115,
title = {Composition, constitution and stability of the synthetic hollandites: A/sub x/M/sub 4-2x/N/sub 2x/O/sub 8/, M=Ti, Ge,Ru,Zr,Sn and N=Al,Sc,Cr,Ga,Ru,In and the system (A,Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb,Cs,Sr},
author = {Zand and Everstijn, P.L.A. and Mijlhoff, F.C. and Renes, G.H. and Ijdo, D.J.W.},
abstractNote = {Synthetic hollandite compounds of composition Ba/sub x/M(IV)/sub 4-2x/N(III)/sub 2x/O/sub 8/ (M=Ti, Ge, Ru, Zr, Sn; N=Al, Sc, Cr, Ga, Ru, In) and Sr/sub x/M(IV)/sub 4-2x/N(III)/sub 2x/O/sub 8/ (M=Ti, Ge, Ru; N=Al, Cr, Ga) and (A, Ba)/sub x/Ti/sub y/Al/sub z/O/sub 8/ with A=Rb, Cs, Ca, Sr have been studied by electron and X-ray diffraction and high resolution electron microscopy. They have been found to be stable only within certain ranges of x, depending on the M and N ions. The lower value of x is never less than 0.56, the upper x level is about 0.73. Higher x are correlated with larger radii of M and N. The variation in x gives rise to an incommensurate occupation by the A ions in the tunnels. Correlation among tunnel sequences varies widely, also depending on the nature of the M and N ions. The lower and upper x, the cell dimensions, the correlation between the tunnels and the stability in water at 300/sup 0/C of the existing hollandites are given.},
doi = {},
journal = {Mater. Res. Bull.; (United States)},
number = ,
volume = 22:4,
place = {United States},
year = {1987},
month = {4}
}