Geoscience Reference
In-Depth Information
z
(001)
(010)
y
(100
x
(001)
z
(001)
(121)
(201)
(120)
-
(110)
(110)
-
-
(120)
(110)
-
-
-
(110)
(120)
(120)
(120)
(a)
(b)
Figure 8.25 Habit of typical hydrothermal LiGaO
2
crystals (a) grown on a spurious seed
and (b) grown on (010) seed
[92]
.
autoclave for 10 days at the dissolving temperature of 390
C, 360
Cgrowthtempera-
ture, and 76% fill. In addition, the nutrient was made by melting Li
2
CO
3
and Ga
2
O
3
as
a part of Czochralskii-grown crystals or from hydrothermal crystals with a diamond-
impregnated wire saw. Growth rates have been measured by determining the increase in
seed thickness upon the completion of the experimental run.
Figure 8.25
shows the habit
of typical hydrothermal LiGaO
2
crystals (a) grown on a spurious seed, (b) grown on
(010) seed.
The perfection of hydrothermally grown LiGaO
2
was excellent as evidenced by the
absence of electrical twinning. The material grown in (001) is virtually free of (OH).
8.11 Hydrothermal Synthesis of Sulfides
The hydrothermal technique has been popularly used for the synthesis of sulfides
for the past several decades. The main advantage of this technique is the production
of fairly large-size single crystals of sulfides. From the literature survey, it is
