qusongite
{{Infobox mineral
| name = Qusongite
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| category = Native element minerals
| formula = WC
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| strunz = 1.BA.25
| system = Hexagonal
| class = Ditrigonal dipyramidal ({{overline|6}}m2)
H-M symbol: ({{overline|6}} m2)
| symmetry = P{{overline|6}}m2
| unit cell = a = 2.902, c = 2.831 [Å]; Z = 1
| color = black, steel grey
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| references = [http://www.mindat.org/min-35898.html Mindat]
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Qusongite is an extremely rare mineral with the simple formula WC, which shows the mineral to be a naturally occurring tungsten carbide. It was found in Luobusa ophiolite, China. This ophiolite is known for many natural reduced compounds, including native metals, diamond, silicides and carbides (e.g., moissanite, natural silicon carbide). Qusongite crystallizes in the hexagonal system, with space group P-6m2.Fang, Q., Bai, W., Yang, J., Xu, X., Li, G., Shi, N., Xiong, M., and Rong, H., 2009. Qusongite (WC): A new mineral. American Mineralogist 94(2-3), 387-390.{{cite web|url=http://www.mindat.org/min-35898.html |title=Qusongite: Qusongite mineral information and data |website=Mindat.org |access-date=2016-03-04}}{{cite web|url=http://www.mindat.org/loc-5457.html |title=Luobusha ophiolite ("Luobusa ophiolite"), Qusum Co. (Qusong Co.), Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture), Tibet Autonomous Region, China - Mindat.org |website=Mindat.org |access-date=2016-03-04}}