Nickel-Strunz classification: 09.

The zeolite structural group (Nickel-Strunz classification) includes:

He is best known for creating the Nickel-Strunz classification, the ninth edition of which was published together with Ernest Henry Nickel.

Strunz developed a classification for minerals that is based on their chemical composition and their crystal structure, now known as Nickel-Strunz classification.

He is best known as an editor of the ninth edition of the Nickel-Strunz classification together with Karl Hugo Strunz.

German mineralogist Karl Hugo Strunz's Mineralogische Tabellen introduces Nickel-Strunz classification of minerals.

In the Nickel-Strunz classification daubréelite is part of the "Sulfides and Sulfosalts" and further a "metal sulfide with a metal-sulfide ratio of 3:4 and 2:3".

Nickel-Strunz classification is a scheme for categorizing minerals based upon their chemical composition, introduced by German mineralogist Karl Hugo Strunz (24 February 1910 - 19 April 2006) in his Mineralogische Tabellen (1941).