Hydrokenoelsmoreite
White stolzite grains accent rich yellow veins of Hydrokenoelsmoreite microcrystals
General
Category	Oxide minerals
Formula (repeating unit)	□2W2O6H2O
IMA symbol	Hkm[1]
Strunz classification	4.DH.15
Crystal system	3C polytype: Isometric 6R polytype: Trigonal
Crystal class	3C polytype: Hexoctahedral (m3m) 6R polytype: Rhombohedral (3)
Identification
Color	White
Cleavage	None
Fracture	Splintery
Tenacity	Brittle
Mohs scale hardness	3
Luster	Adamantine
Streak	White
References	[2][3][4]

Hydrokenoelsmoreite is a hydrous tungsten oxide mineral with formula □₂W₂O₆(H₂O). Hydrokenoelsmoreite is a colorless to white, translucent isometric mineral. It has a Mohs hardness of 3, exhibits no cleavage and has a splintery fracture. It has a vitreous to adamantine luster. It is optically isotropic with an index of refraction of n = 2.24.

It forms from the oxidation of ferberite within granitic pegmatite dykes and in pegmatitic greisen veins. It has a structure based on a defect pyrochlore lattice (A2B2O6O’).

It was first described for an occurrence in Elsmore Hill, New South Wales, Australia from where it takes its name.

• Williams, P.A., Leverett, P., Sharpe, J.L., Colchester, D.M. (2005): Elsmoreite, cubic WO3•0.5H2O, a new mineral species from Elsmore, New South Wales, Australia. Canadian Mineralogist, 43, 1061-1064
• American Mineralogist, volume 91, pages 216–224, 2006.

• Atencio, D., Andrade, M. B., Christy, A. G., Gieré, R., & Kartashov, P. M. (2010). The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist, 48(3), 673–698.doi: 10.3749/canmin.48.3.673^{[dead link‍]}