[5] Krutovite is composed of nickel and arsenic with trace to minor amounts of cobalt, iron, copper, sulfur, and antimony.

[5] Krutovite occurs in the Geshiber vein, Svornost shaft, 8th level, in the northwest strike of Jáchymov, Czech Republic, in the Ore Mountains.

[7] Krutovite comes from the midnight vein in the Svornmost mine which contains nickel ores as deep as 100 meters in the granite body.

The midnight veins are known to exhibit frequent variations in their strike and dip and have an average width of 10–30 cm.

[5] Kruotvite was named in honor of Georgi Alekseyevich Krutov (24 April 1902 - 11 December 1989) who was a professor of mineralogy of Moscow University in Russia.

[6] Krutov determined the significance of chlorine in the development of contact-metasomatic deposits, which are found in the distribution of amphiboles, scapolite, and chlorapatite.