Chemical Formula:	Y2Fe++Be2Si2O10
Composition:	Molecular Weight = 467.85 g
	Beryllium	3.85 %	Be	10.69 %	BeO	0.00 %
	Oxygen	34.20 %	O	0.00 %		0.00 %
	Silicon	12.01 %	Si	25.69 %	SiO2	0.00 %
	Iron	11.94 %	Fe	15.36 %	FeO	0.00 %
	Yttrium	38.01 %	Y	48.27 %	Y2O3	0.00 %
		100.01 %		100.01 %
Empirical Formula:	Y2Fe2+Be2(Si2O10)
Environment:	Pegmatite veins rich in alkaline-earth elements
Locality:	Ytterby, Resarö, Sweden.. Link to MinDat.org Location Data.
Name Origin:
Synonym: