|
|
【答案】应助回帖
★ ★ ★ ★ ★ zqs1211: 金币+5, ★★★很有帮助, 碳酸银就这两种晶型吗?谢谢您的帮助! 2013-05-27 11:01:44
2.
Card Information
Names: beta-Silver Carbonate
Formula: Ag2 C O3
PDF Number: 31-1236
Quality: star
Subfiles: inorganic COR
Cell and Symmetry Information
System: hexagonal Space Group: P31c (no. 159)
a: 9.180 c: 6.485
Density (Dx): 5.804 Z: 6
Instrument Information
Radiation: CuKa1 Wavelength: 1.5406
Instrument(d): Guinier Standard: Al2O3
Instrument(I): densitometer I type: unknown
Comments and Additional Information
Colour: Greenish yellow
General: A c.p. chemical from Fluka AG, Switzerland assay >97%; residue after ignition <0.5%.
General: Pattern at 150 C and 0.45 MPa (=4.5 bar) C O2-pressure.
General: This beta-phase could only be achieved on cooling from the structural related alpha-phase. The strongest lines (I > 6) of this diagram coincide with those of Ashford, N., Snelson [Table III and figure 7 in J. Chem. Phys., 51 532-538 (1969)] when shifted over .27 degrees 2 theta.
Literature References
General: van Hattum, W. et al., Lab. TechnischeNatuurkunde, TH-Delft, Netherlands. ICDD Grant-in-Aid ( )
Peak Data
PeakList
h k l d I
1 0 1 5.0300 2
1 1 0 4.5900 25
2 0 1 3.3890 2
1 0 2 3.0030 4
2 1 1 2.7260 4
3 0 0 2.6500 100
2 0 2 2.5110 1
2 2 0 2.2940 6
2 0 3 1.8980 1
2 2 2 1.8740 16
3 1 2 1.8230 1
3 2 1 1.7560 2
4 1 0 1.7340 6
4 0 2 1.6940 1
3 0 3 1.6740 1
0 0 4 1.6220 2
3 3 0 1.5300 16
4 2 1 1.4640 2
5 1 1 1.3950 4
3 0 4 1.3830 4
2 2 4 1.3240 1
5 0 3 1.2810 2 |
|