AM_Danburite_5 Formula: Ca B2 Si2 O8 Name: Danburite Unit cell: 8.092 8.796 7.7768 90.0 90.0 90.0 , V=553.53 Space group: PNAM (62)

Sugiyama K , Takeuchi Y , Zeitschrift fur Kristallographie , 173 (1985) p.293-304, Unusual thermal expansion of a B-O-bond in the structure of danburite CaB2Si2O8, Locality: Toroku mine, Miyazaki Prefecture, Japan, Note: AnisoB s from ICSD, Note: x(B) corrected to match reported bond lengths, Sample: T = 817 C