View EntryDate of entry : 08/11/2010


The modulated structure of intermediate plagioclase feldspar
CaxNa1-xAl1+xSi3-xO8.

Yamamoto, A.; Nakazama, H.; Kitamura, M.; Morimoto, N. Acta Cryst. B 40 228 - 237 (1984)

[ B-IncStrDB ID: 412EyBC6x ]
 
Submitted by : System [B-IncStrDB]CIF File

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An52_MOD

Chemical Properties

Structural Formula Sum: Al0 Ca0.52 Na0.48 O8 Si4   [Help]
Weight: 272.2 Daltons  [Help]

  •  Additional Chemical Information   

Crystallographic Properties

Exp. Crystal Type of Struc.: mod   [Help]
a: 8.178(1) Å  [Help]
b: 12.865(1) Å  [Help]
c: 14.218(1) Å  [Help]
α: 93.53(1) °  [Help]
β: 116.21(1) °  [Help]
γ: 89.92(1) °  [Help]
Volume: 1339(2) Å3  [Help]
Crystal System: triclinic   [Help]
Space Group Name (H-M): P -1   [Help]

Symmetry operations of the space group [Help]   

Space Group Name: X-1(αβγ)0   [Help]
Number of Formula Units: 8   [Help]
  •  Additional Crystal Information   

Experimental Data

Radiation source: X-rays   [Help]
Max Order of Satellite Reflections: 1   [Help]

  •  Additional Experimental Information   

Refinement Properties

Modulation function desc.: Displacive and occupational modulations:Fourier series. 1st-order harmonics.   [Help]
Structure factors calc. details: Gaussian integration   [Help]
# of observed reflections: 4735   [Help]
Residual factor for the observed reflns.: 0.074   [Help]
Refinement Special Details: For Al/Si sites the scattering factor is that of Si.   [Help]

  •  Additional Refinement Information   

Diffraction Data

Radiation source: X-rays   [Help]


  •  Reference Structure Information   

  •  Modulation Parameters (Tables)   

  •  Refinement Summary   

  •  Modulation Parameters (Atom Sites Summary)