Framework Type
Powder Diffraction Pattern for Keatite
Set Parameters:
2θ range:
°
-
°
Step size:
°2θ
Background:
Polarization factor:
Wavelength:
As specified
CrA1 (2.28970 Å)
CrA2 (2.29361 Å)
Cr (2.29090 Å)
FeA1 (1.93604 Å)
FeA2 (1.93998 Å)
Fe (1.93730 Å)
CuA1 (1.54056 Å)
CuA2 (1.54439 Å)
Cu (1.54180 Å)
MoA1 (0.70930 Å)
MoA2 (0.71359 Å)
Mo (0.71070 Å)
AgA1 (0.55941 Å)
AgA2 (0.56380 Å)
Ag (0.56080 Å)
or
Å
keV
Peak shape parameters
(The pattern is calculated using a pseudo Voigt function with FWHM = sqrt(U + V tan θ + W tan
2
θ))
:
Peak range:
FWHM
Mixing parameter:
%
Peak width:
set UVW at
calculate UVW such that
U =
FWHM =
at
°2θ
V =
FWHM =
at
°2θ
W =
FWHM =
at
°2θ
Intensity scale:
Reference peak, scaled to
,
is the
highest peak in 2θ range
peak closest to
°2θ
reflection (hkl)
Plot parameters:
Output:
on screen
Postscript
HP-GL
ASCII
Size:
small (410x310)
medium (640x480)
large (880x650)
Intensity axis:
-
List hkl and intensity
plot powder pattern
Crystal data:
Composition:
[
Si
12
O
24
]
Refined composition:
[
Si
12
O
24
]
Space group:
P4
3
2
1
2
(# 96)
Setting:
Cell parameters:
a
=
7.46Å
b
=
7.46Å
c
=
8.61Å
α =
90°
β =
90°
γ =
90°
Refinement:
X-ray single crystal refinement, R
hk0
=0.129, R
hhl
=0.098
Reference:
Shropshire, J., Keat, P.P. and Vaughan, P.A.
Z. Kristallogr.
,
112
, 409-413 (1959)
Atomic Coordinates:
Atom
Form Factor
x
y
z
PP
B(iso)
Si1
Si
0.326
0.120
0.248
1.0
2.34
Si2
Si
0.410
0.410
0.000
1.0
2.34
O1
O
0.445
0.132
0.400
1.0
2.34
O2
O
0.117
0.123
0.296
1.0
2.34
O3
O
0.344
0.297
0.143
1.0
2.34
Copyright © 2007 Structure Commission of the International Zeolite Association (
IZA-SC
)
