Synthesis and Mechanism of Tetracalcium Phosphate from Nanocrystalline Precursor
Table 1
Vibrational wave numbers [cm−1] of samples.
Raman = 514.5 nm
FT-IR KBr
Assignments
1400~1500°C ×8 h
327
Lattice modes
390, 408, 448, 481
454, 470, 501
, bands in TTCP, symmetric bending vibrations mode
555, 565, 577, 598, 608, 616
570, 593, 621
ν
4, bands in TTCP, asymmetric bending vibrations mode
941, 948, 957, 963
938, 958
ν
1, bands in TTCP, symmetric stretching mode
992, 1010, 1027, 1046, 1075, 1095, 1122, 1135
985, 1009, 1031, 1045, 1063, 1074, 1094, 1105
ν
3, bands in TTCP, asymmetric stretching mode
850–1150°C ×8 h
430, 445
431, 471
ν
2, bands in HA
579, 590, 607
604
ν
4, bands in HA
634
Vibrational mode of OH−
871
Out-of-plane bending vibrations of
961
961
ν
1, bands in HA
1028, 1046, 1075, 1123
1025, 1091
ν
3, bands in HA
1085
Symmetric stretching of
1412, 1452, 1467
Asymmetric stretching of
3572
3572
OH− stretching vibration (in HA)
3619
3643
OH− stretching vibration (in Ca(OH)2)
We are committed to sharing findings related to COVID-19 as quickly as possible. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. Review articles are excluded from this waiver policy. Sign up here as a reviewer to help fast-track new submissions.
