Discovery	1880 de Marignac
Abundance	6.2
Radius	2.5
Electronegativity	1.2
Ionization	6.1501
Number of isotopes	17
Electronic configuration	[Xe] 4f7 5d1 6s2
Oxidation states	1,2,3
Electron by energy level	2,8,18,25,9,2

Minerals containing this element : 30

Mineral	Hardness	Density	Formula
Adamsite-(Y)	3.00 / 3.00		NaY(CO₃)₂Â·6H₂O
Agardite-(Ce)	3.00 / 3.00	3.72	Cu²⁺₆Ce(AsO₄)₃(OH)₆Â·3H₂O
Aluminocerite-(Ce)	5.00 / 5.00	4.68	(Ce,Ca)₉Al(SiO₄)₃(SiO₃OH)₄(OH)₃
Bussyite-(Ce)		3.00	(Na,H₂O)₆(Ce,REE)₃Be₅MnSi₉(O,OH)₃₀F₄
Caysichite-(Y)	4.50 / 4.50	3.03	(Ca,Yb,Er)₄Y₄Si₈O₂₀(CO₃)₆(OH)Â·7H₂O
Cerite-(La)	5.00 / 5.00	4.70	(La,Ce,Ca)₉(Fe³⁺,Ca,Mg)(SiO₄)₃(SiO₃OH)₄(OH)₃
Chukhrovite-(Nd)	3.50 / 4.00	2.42	Ca₃NdAl₂SO₄F₁₃Â·12H₂O
Decrespignyite-(Y)	4.00 / 4.00	3.64	Y₄Cu(CO₃)₄Cl(OH)₅Â·2H₂O
Dissakisite-(La)	6.50 / 7.00	3.79	CaLaMgAl₂(Si₂O₇)(SiO₄)O(OH)
Fluorcalciobritholite	5.50 / 5.50	4.20	(Ca,REE)₅(SiO₄,PO₄)₃F
Hingganite-(Ce)	5.00 / 6.00	4.28	BeCe(SiO₄)(OH)
Hingganite-(Y)	5.00 / 6.00		BeY(SiO₄)(OH)
Iwashiroite-(Y)	6.00 / 6.00	7.10	YTaO₄
Johnsenite-(Ce)	5.00 / 6.00	3.20	Na₁₂Ce₃Ca₆Mn₃Zr₃WSi₂₅O₇₃(CO₃)(OH)₂
Kamotoite-(Y)		3.93	Y₂O₄(UO₂)₄(CO₃)₃Â·14H₂O
Kozoite-(La)		4.16	LaCO₃(OH)
Lepersonnite-(Gd)		3.97	CaGd₂(UO₂)₂₄(CO₃)₈Si₄O₂₈Â·60H₂O
Levinsonite-(Y)		2.18	YAl(SO₄)₂(C₂O₄)Â·12H₂O
Mineevite-(Y)	4.00 / 4.00	2.85	Na₂₅BaY₂(CO₃)₁₁(HCO₃)₄(SO₄)₂F₂Cl
Monazite-(Sm)		5.51	SmPO₄
Moskvinite-(Y)	5.00 / 5.00	2.91	Na₂KYSi₆O₁₅
Paratooite-(La)	4.00 / 4.00		(La,Ca,Na,Sr)₆Cu(CO₃)₈
Percleveite-(Ce)	6.00 / 6.00	5.21	Ce₂Si₂O₇
Piergorite-(Ce)	5.50 / 6.00		Ca₈Ce₂AlLiSi₆B₈O₃₆(OH)₂
Plumboagardite	3.00 / 3.00	3.74	Cu²⁺₆(Pb,La,Nd,Ce,Ca)(AsO₄)₃(OH)₆Â·3H₂O
Pyatenkoite-(Y)	4.00 / 5.00	2.68	Na₅YTiSi₆O₁₈Â·6H₂O
Samarskite-(Yb)	5.00 / 6.00	7.03	YbNbO₄
Schuilingite-(Nd)	3.00 / 4.00	5.20	CuPbNd(CO₃)₃(OH)Â·1.5H₂O
Uedaite-(Ce)	5.00 / 6.00	4.19	Mn²⁺CeAl₂Fe²⁺(Si₂O₇)(SiO₄)O(OH)
Västmanlandite-(Ce)	6.00 / 6.00	4.51	Ce₃CaMg₂Al₂Si₅O₁₉(OH)₂F