Fredrik Johan Wiik, also known as F.J. Wiik (December 16, 1839 in Helsinki

Helsinki

Helsinki is the capital and largest city in Finland. It is in the region of Uusimaa, located in southern Finland, on the shore of the Gulf of Finland, an arm of the Baltic Sea. The population of the city of Helsinki is , making it by far the most populous municipality in Finland. Helsinki is...

 - June 15, 1909 in Helsinki) was a Finnish geologist

Geologist

A geologist is a scientist who studies the solid and liquid matter that constitutes the Earth as well as the processes and history that has shaped it. Geologists usually engage in studying geology. Geologists, studying more of an applied science than a theoretical one, must approach Geology using...

 and mineralogist; in 1877, he was named the first professor of geology and mineralogy at the Imperial Alexander University of Finland , where his students included Jakob Sederholm

Jakob Sederholm

Jakob Johannes Sederholm was a Finnish petrologist most associated with his studies of migmatites.Troubled by illness throughout his life, Sederholm originally chose to study geology to allow him to work outdoors...

. He was also the first scientist in Finland to use a petrographic microscope

Petrographic microscope

A petrographic microscope is a type of optical microscope used in petrology and optical mineralogy to identify rocks and minerals in thin sections. The microscope is used in optical mineralogy and petrography, a branch of petrology which focuses on detailed descriptions of rocks...

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Wiik died in 1909, on a geological expedition; his body was found clutching his geologist's hammer

Geologist's hammer

A geologist's hammer, rock hammer, rock pick or geological pick is a hammer used for splitting and breaking rocks. In field geology, they are used to obtain a fresh surface of a rock in order to determine its composition, nature, mineralogy, history and field estimate of rock strength...

.

The mineral wiikite is named for him.