Ixiolite is an accessory oxide mineral found in granitic pegmatites.

[5] Detailed studies of the scandium, tin and titanium rich varieties indicate that they form crystals in the orthorhombic system whereas tungsten ixiolite is monoclinic.

The name is for Ixion, the Greek mythological character related to Tantalus, as the mineral contains tantalum.

[5] As with other tantalum and niobium bearing minerals considerable substitution and a number of varieties exist.

[4] Ixiolite together with microlite, tantalite, tapiolite, wodginite are the most important minerals mined for the element tantalum.