Electronic data		Thermal data		Steric data
Shells: 2,8,18,10,2 Orbitals: [Kr] 4d2 5s2 Electronegativity: 1.2, 1.4 1. Ionization potential: 6.6339 eV 2. Ionization potential: 13.13 eV 3. Ionization potential: 22.99 eV Oxidation states: 4 Electrical conductivity: 0.0236 10^6		Melting point: 1852 °C ±2 Boiling point: 4377 °C Specific heat: 0.27 J/gK Heat of fusion: 16.90 kJ/mol Heat of vaporization: 58.20 kJ/mol Thermal conductivity: 0.227 W/cmK		Atomic radius: 2.16 Å Ionic radius: 0.84 Å () Covalent radius: 1.45 Å Atomic volume: 14.1 cm³/mol Density (293 K): 6.4 g/cm³ Crystal structure: Hexagonal

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
86Zr	0	86	0	16.5h	-	View
88Zr	0	88	0	83.4d	-	View
89Zr	0	89	9/2	3.27d	EC,+	View
90Zr	51.46	89.9043	0	--	stable	--
91Zr	11.23	90.9053	5/2	--	stable	--
92Zr	17.11	91.9046	0	--	stable	--
93Zr	0	92.9057	5/2	1.53E06y	-	View
94Zr	17.38	93.9063	0	--	stable	--
95Zr	0	94.9077	5/2	64.02d	-,b-	View
96Zr	2.8	95.9083	0	--	stable	--
97Zr	0	97	1/2	16.9h	-,b-	View

Legend

Name origin:	From the mineral, zircon
Description:	Gray-white, lustrous, corrosion-resistant metal.
Discovered by:	Martin Klaproth
Year:	1789
Place:	Germany
Sources:	Found in many minerals such as zircon and baddeleyite.
Use(s):	Used in alloys such as zircaloy which is used in nuclear applications since it does not readily absorb neutrons. Also baddeleyite is used in lab crucibles. Used in high-performance pumps and valves. Clear zircon (ZrSiO4) is a popular gemstone.