Table 1 Variation of lattice parameters for samples with various Si/Sr ratios at different sintering temperatures.

From: Improving preparation and luminescence properties of Eu and dy doped Sr2MgSi2O7 phosphors by adding excess silica

Temp.

Si/Sr

a

b

c

Volume (a*b*c)

1250 °C

1

8.00

8.00

5.16

330.24

1.1

8.00

8.00

5.16

330.24

1.2

8.01

8.01

5.16

331.07

1.3

8.01

8.01

5.16

331.07

1.4

7.99

7.99

5.15

328.78

1300 °C

1

8.01

8.01

5.16

331.07

1.1

8.03

8.03

5.18

334.01

1.2

8.00

8.00

5.16

330.24

1.3

8.01

8.01

5.17

331.71

1.4

8.01

8.01

5.18

332.35

1350 °C

1

8.00

8.00

5.15

329.60

1.1

7.99

7.99

5.13

327.50

1.2

7.99

7.99

5.13

327.50

1.3

7.98

7.98

5.14

327.32

1.4

7.98

7.98

5.14

327.32

1400 °C

1

7.99

7.99

5.13

327.50

Calculation

1

8.08

8.08

5.22

340.80