Niobium pentaiodide

Niobium pentaiodide
Names
	Other names Niobium(V) iodide
Identifiers
CAS Number	13779-92-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	75550;
ECHA InfoCard	100.034.006
EC Number	237-422-1;
PubChem CID	83728;
UNII	6YYE4L5XPW ;
CompTox Dashboard (EPA)	DTXSID1065633;
	InChI InChI=1S/5HI.Nb/h5*1H;/q;;;;;+5/p-5 Key: FWIYBTVHGYLSAZ-UHFFFAOYSA-I;
	SMILES [Nb](I)(I)(I)(I)I;
Properties
Chemical formula	Nb2I10
Molar mass	1475
Appearance	yellow solid
Density	5.30 g/cm3
Melting point	543 °C (1,009 °F; 816 K) sublimes
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
Related compounds
Related compounds	Tantalum pentaiodide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Niobium pentaiodide is the inorganic compound with the formula Nb₂I₁₀. Its name comes from the compound's empirical formula, NbI₅. It is a diamagnetic, yellow solid that hydrolyses readily. The compound adopts an edge-shared bioctahedral structure, which means that two NbI₅ units are joined by a pair of iodide bridges. There is no bond between the Nb centres. Niobium(V) chloride, niobium(V) bromide, tantalum(V) chloride, tantalum(V) bromide, and tantalum(V) iodide, all share this structural motif.