Abstract
We grew single crystals of K 1.88Ga 1.88Sn 6.12O 16 hollandite-type compound and precisely determined their crystal structure by X-ray diffraction. K 1.88Ga 1.88Sn 6.12O 16 fibrous crystals measuring an average of about 2 mm in length and 60 μm in diameter were obtained by slow-cooling (from 1623 K to 1273 K) of a flux melt consisting of a 40 mol% crystal composition of (K 2O) 1(Ga 2O 3) 1(SnO 2) 1 and a 60 mol% flux composition of (K 2O) 2(MoO 3) 1(B 2O 3). The unit cell of K 1.88Ga 1.88Sn 6.12O 16 ( a = 1.0389(2) nm, c = 0.3132(2) nm, V = 0.3381(2) nm 3) was larger than that of K 1.52Ga 1.52Ti 6.48O 16. The ionic size difference with the replacement of Ti by Sn, 10%, was relaxed by an anisotropic expansion of the octahedra by 2.6% in the (001) plane and 5.8% along the c-axis.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
