Inorganic Solid Phases

Al₂[Al_2+2xSi_2−2x]O_10−x, x= 0.25 (Al_2.3Si_0.7O_4.85, T = 1823 K) Crystal Structure

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General Information

Phase Label(s): Al_2.3Si_0.7O_4.85
Structure Class(es): –
Classification by Properties: –
Mineral Name(s): mullite
Pearson Symbol: oP24
Space Group: 55
Phase Prototype: Al(Al_0.7Si_0.3)₂O_4.8
Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; France, Grenoble, Institut Laue-Langevin ILL, D2B (determination of structural parameters), neutrons; λ = 0.15949 nm (determination of cell and structural parameters), T = 1823 K (determination of cell and structural parameters)
Phase Class(es): –
Compound Class(es): silicate
Interpretation Detail(s): complete structure determined; temperature dependence studied, Rietveld refinement
Sample Detail(s): mullite sample from synthetic, sample prepared from Al₂O₃, SiO₂, powder (determination of cell and structural parameters)

Substance Summary

Standard Formula: Al_2.25Si_0.75O_4.875
Alphabetic Formula: Al_2.25O_4.875Si_0.75
Published Formula: Al₂[Al_2+2xSi_2−2x]O_10−x, x= 0.25
Refined Formula: Al_2.25O_4.88Si_0.75
Wyckoff Sequence: 55,hg⁴da
Z Formula Units: 2
Density: ρ = 3.10 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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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_1616665

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 Al2[Al2+2xSi2−2x]O10−x, x= 0.25 (Al2.3Si0.7O4.85, T = 1823 K) Crystal Structure sd_1616665 (Springer-Verlag GmbH, Heidelberg, © 2016)

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