Synthesis and single crystal growth of the new high-pressure phase of GaOOH

• Published in: Journal of alloys and compounds Vol. 459; no. 1; pp. 95 - 97
• Main Authors: Nikolaev, N.A., Lityagina, L.M., Dyuzheva, T.I., Kulikova, L.F., Bendeliani, N.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 14-07-2008
• Subjects: Gallium oxyhydroxide; High pressure; High temperature; Hydrothermal crystal growth; Gallium oxyhydroxide; High temperature; Hydrothermal crystal growth; High pressure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2007.04.244

New high-pressure phase of GaOOH which is metastable under normal conditions has been obtained at
p
=
8.5
GPa and
T
=
400
°C in presence of supercritical aqueous vapor. The structure of β-GaOOH was related to InOOH structure type (orthorhombic,
P2
1
nm,
Z
=
2). The lattice parameters are:
a
=
4.893
±
0.001
Å;
b
=
4.338
±
0.001
Å;
c
=
2.958
±
0.001
Å;
ρ
calc
=
5.43
g/cm
3. Transparent colorless crystals with a size of about 0.125
mm
×
0.125
mm
×
0.650
mm were grown.