Yttrium barium copper oxide (1/2/3/6.9)

Ba₂Cu₃O_6.9Y

Williams, AKwei, G HDreele, R B vonLarson, A CRaistrick, I DBish, D L

Physical Review, Serie 3. B - Condensed Matter (18,1978-) (1988) 37, 7960-7962

a=3.82030(8)Å   b=3.88548(10)Å   c=11.68349(23)Å

α=90°   β=90°   γ=90°