Inorganic Solid Phases

Pb₂KNb₅O₁₅ paraelectric (KNb₅Pb₂O₁₅ ht1, T = 790(1) K) Crystal Structure

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General Information

Phase Label(s): KNb₅Pb₂O₁₅ ht1
Structure Class(es): tetragonal bronze
Classification by Properties: –
Mineral Name(s): –
Pearson Symbol: tP54
Space Group: 127
Phase Prototype: KTa₅Pb₂O₁₅
Measurement Detail(s): automatic diffractometer; France, Grenoble, Institut Laue-Langevin ILL, D1B (determination of structural parameters), neutrons; λ = 0.1985 nm (determination of structural parameters), T = 790(1) K (determination of structural parameters)
Phase Class(es): –
Compound Class(es): oxide
Interpretation Detail(s): complete structure determined; diffraction techniques compared, Rietveld refinement; 55 variables, wR_P = 0.0412; R_B = 0.0314
Sample Detail(s): sample prepared from PbO, K₂CO₃, Nb₂O₅, powder (determination of structural parameters)

Substance Summary

Standard Formula: KNb₅Pb₂O₁₅
Alphabetic Formula: KNb₅O₁₅Pb₂
Published Formula: Pb₂KNb₅O₁₅ paraelectric
Refined Formula: KNb₅O₁₅Pb₂
Wyckoff Sequence: 127,j³i²hgdca
Z Formula Units: 2
Density: ρ = 6.08 Mg·m⁻³

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Crystallographic Data

Cell Parameters

	Published Data	Standardized Data
	Published Data	Unit Cell	Niggli-Reduced Cell
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a
b
c
α
β
γ
a/b
b/c
c/a
V

Atom Coordinates

Standardized

Site	Element	Wyckoff Symbol	Symmetry	X	Y	Z	Occupation	Co-ord. No.	Atomic Env.
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Published

Site	Element	Wyckoff Symbol	Symmetry	X	Y	Z	Occupation
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Displacement Parameters

Isotropic

Site	Published B [nm²]	Type	Computed B_eq [nm²]
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Experimental Details

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Reference

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3D Interactive Structure

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About this content

Database name

PAULING FILE Multinaries Edition – 2012

Dataset ID

sd_1904214

Copyright

©Springer & Material Phases Data System (MPDS), Switzerland & National Institute for Materials Science (NIMS), Japan, 2016

Chief Editor

Pierre Villars, Material Phases Data System (MPDS), CH-6354 Vitznau, Switzerland

villars.mpds@bluewin.ch

Credits

SpringerMaterials Release 2016.

Project Coordinator: Shuichi Iwata

Section-Editor: Karin Cenzual (Crystal Structures)

Cite this content

Pierre Villars (Chief Editor), PAULING FILE in: Inorganic Solid Phases, SpringerMaterials (online database), Springer, Heidelberg (ed.) SpringerMaterials Pb2KNb5O15 paraelectric (KNb5Pb2O15 ht1, T = 790(1) K) Crystal Structure sd_1904214 (Springer-Verlag GmbH, Heidelberg, © 2016)

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