Friday, July 8, 2016

Single crystal growth of type I Na–Si clathrate by using Na–Sn flux

Highlights

Single crystals of type I Na–Si clathrate, Na8Si46, were synthesized by using Na–Sn flux.
Preparation conditions of the single crystals were cleared.
The details of the crystal growth process were investigated.

Abstract

Single crystals of type I Na–Si clathrate, Na8Si46, were synthesized by heating Na, Na4Si4, and Na15Sn4 at 723 K under an Ar gas pressure of 104 Pa for 12 h. The single crystals having {110} habit planes grew up to 1.5 mm in size due to Na evaporation from a Na–Si–Sn melt with a starting compositional molar ratio of Na/Si/Sn=5.75:2:1.

Keywords

  • A2. Single crystal growth
  • A2. Growth from solutions
  • A2. Tin flux growth
  • B1. Inorganic compounds
  • B1. Silicon compounds
  • B1. Clathrate compound