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1 entry selected.
CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
***Click the ANX, Pearson or Wyckoff Symbol to find structures with that symbol***.
CC=87674 Help
TitleRietveld refinement of the crystallographic structure of human dental enamel apatites.
AuthorsWilson, R.M.;Elliott, J.C.;Dowker, S.E.P.
ReferenceIC&volume=84&fpage=140&details=yes target=icsd_help>American Mineralogist (1999) 84, 140-141
Link XRef SCOPUS Google
CompoundC0.83 H2.26 Ca9.383 Mg0.049 Na0.21 O25.43 P5.17 - [Apatite] Calcium sodium magnesium phosphate(V) carbonate hydroxide * [A6B10X25] [hP43] [i h4 f e] []
Cell9.4343(22), 9.4343(22), 6.8681(16), 90., 90., 120.
P63/M (176) V=529.4
RemarksR=0.072000 : D M =Apatite : X
Deviation of the charge sum from zero tolerable.
At least one temperature factor missing in the paper.
A site occupation is implausible or meaningless but agrees with the paper.
The coordinates are those given in the paper but the atomic distances do not agree with those calculated during testing.The coordinates are probably correct.
Difference between the formula calculated from the PARM record and the FORM record tolerable.

Atom (site) Oxid. x, y, z, B, Occupancy
Ca1(4f)2
Na1(4f)1
Mg1(4f)2
Ca2(6h)2
Na2(6h)1
Mg2(6h)2
P1(6h)5
C1(6h)4
O1(6h)-2
O2(6h)-2
O3(12i)-2
O4(4e)-2
H1(4e)1
H2(4e)1
0.330.660.0000.97
0.330.660.0000.02
0.330.660.0000.00
0.240.980.2500.91
0.240.980.2500.02
0.240.980.2500.00
0.390.360.2500.86
0.390.360.2500.13
0.320.480.2500.90
0.560.450.2501.03
0.340.260.0600.93
000.1700.56
000.0600.23
00.33

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