Inorganic Solid Phases

KAlSi₃O₈ Crystal Structure

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General Information

Phase Label(s): KAlSi₃O₈ san
Structure Class(es): –
Classification by Properties: –
Mineral Name(s): sanidine
Pearson Symbol: mS52
Space Group: 12
Phase Prototype: K(Al_0.25Si_0.75)₄O₈
Measurement Detail(s): automatic diffractometer (determination of cell and structural parameters), X-rays, Mo Kα; λ = 0.071069 nm (determination of cell and structural parameters)
Phase Class(es): –
Compound Class(es): silicate
Interpretation Detail(s): complete structure determined, 1074 reflections; F > 4σ(F), R = 0.046
Sample Detail(s): adularia sample from Switzerland, Graubünden (Grisons), electron microprobe analysis; 64.92 wt.% SiO₂, 18.61 wt.% Al₂O₃, 14.49 wt.% K₂O, 1.29 wt.% Na₂O, single crystal (determination of cell parameters), single crystal, 0.12 mm³ (determination of structural parameters)

Substance Summary

Standard Formula: KAlSi₃O₈
Alphabetic Formula: AlKO₈Si₃
Published Formula: KAlSi₃O₈
Refined Formula: Al_1.02KO₈Si_2.98
Wyckoff Sequence: 12,j⁵i²g
Z Formula Units: 4
Density: ρ = 2.58 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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Anisotropic

Site	β₁₁ [nm²]	β₂₂ [nm²]	β₃₃ [nm²]	β₁₂ [nm²]	β₁₃ [nm²]	β₂₃ [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_1615656

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 KAlSi3O8 Crystal Structure sd_1615656 (Springer-Verlag GmbH, Heidelberg, © 2016)

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