Tellurite And Fluorotellurite Glasses For Active And Passive

5. Crystallisation studies; MDO 143
It can be seen from this trace, that the Na2CO3 powder used in this study was phase pure,
resulting in a match to JCPDS card number 77-2082: Na2CO3, monoclinic, space group
C2/m. Table (5.3) shows the ten most intense peaks with corresponding 2θ (observed and
theoretical) and Miller indices.
Table (5.3): Ten most intense peaks with corresponding 2θ (observed and theoretical) and
Miller indices for 99.997% Na2CO3 powder, sourced from Alfa Aesar.
Observed
2θθθθ / °
Observed
intensity / %
Theoretical
2θθθθ / °
Theoretical
intensity / %
hkl
JCPDS
Card
30.18673 84.1 30.16265 82 002 77-2082
34.22958 42.4 34.21237 48 020 "
34.50906 56.4 34.52329 51 1 12 "
34.67337 57.3 - - - -
35.29993 65.0 35.25989 100 310 77-2082
38.04644 100.0 38.01481 86 112 "
39.98021 56.5 39.9697 46 202 "
41.15397 54.9 41.12349 31 4 01 "
41.37077 68.3 - - - -
41.56676 46.9 41.48214 50 2 21 77-2082
Fig. (5.6) shows an XRD trace of the 99.995% ZnF2 sourced from Alfa Aesar [4]. It can
be seen from this trace, that the ZnF2 powder used in this study was not phase pure,
resulting in a matches to JCPDS card numbers - 74-1816: Zn(OH)F, orthorhombic, and
JCPDS card number 07-0214: ZnF2, tetragonal, space group P42/mnm. Table (5.4) shows
the ten most intense peaks with corresponding 2θ (observed and theoretical), phases and
Miller indices.