What is "uklonskovite"

n. (context mineralogy English) A monoclinic mineral with a vitreous lustre that has the chemical formula NaMg(SO₄)F.

Uklonskovite ( Na Mg( S O) F) is a colorless monoclinic mineral found in Chile, Italy and Uzbekistan. It is named after Alexandr Sergeievich Uklonskii (b. 1888), mineralogist, Academy of Sciences, Uzbekistan. Its type locality is Kushkanatau salt deposit, Lower Amu Darya River, Karakalpakstan Respublikasi, Uzbekistan.