Kainosite

Formula: Ca₂(Y,Ce)₂(Si₄O₁₂)(CO₃)·H₂OMohs scale hardness: 5-6 Specific gravity: 3,53-3,54 g/cm^{3Rare earth elements: Y, Ce}SILICATES (Germanates) CyclosilicatesReferenceshttp://www.mindat.org/min-2133.html

https://en.wikipedia.org/wiki/Kainosite-%28Y%29

https://commons.wikimedia.org/wiki/File:Kainosite-%28Y%29-tuc1051a.jpg

http://wiki.web.ru/wiki/%D0%9A%D0%B0%D0%B9%D0%BD%D0%BE%D0%B7%D0%B8%D1%82-%28Y%29