Synthesizing Li7Si12: Orthorhombic Silicon Allotrope

[GSRush]

Dear All!

I want to synthesize silicon allotrope. Not just cubic silicon, but orthorhombic.
But in the first step, I need to synthesize Li7Si12.
Is it possible or not?
Any ideas about how to do it?

The main idea can be found at this https://www.researchgate.net/publication/336207000_New_candidate_to_reach_Shockley-Queisser_limit_The_DFT_study_of_orthorhombic_silicon_allotrope_SioP32.

Any ideas?

 

[TeethWhitener]

Just to be clear: the paper you link to is theoretical, and it looks like most of the work that's been done on orthorhombic silicon is also theoretical. So YMMV.

The Zintl phase lithium silicide apparently does exist in the literature:
https://doi.org/10.1016/j.ssnmr.2011.09.002
The synthesis is straightforward, though not particularly easy: Li and Si heated directly under a reduced pressure inert atmosphere, then annealed.