Ferronigerite-2N1S is an iron, tin, alumino-hydroxide mineral that naturally occurs around sillimanite-quartz veins. Ferronigerite-2N1S belongs to the nigerite group, högbomite supergroup. The other constituents of the nigerite group are ferronigerite-6N6S, magnesionigerite-2N1S, magnesionigerite-6N6S, zinconigerite-2N1S and zinconigerite-6N6S. The 2N1S ending stands for the nolanite and spinel structural layers. Ferronigerite-2N1S was first discovered in the Kabba provence of central Nigeria in 1944; it was originally named Nigerite. Its name was later changed to nigerite-6H then to nigerite-6T and in 2003 ferronigertie-2N1S was approved by the International Mineralogical Association.
Hardness:
8 - 9
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Properties
Characteristics
Common Questions
General Info About Ferronigerite-2n1s
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Physical Properties of Ferronigerite-2n1s
Colors
Shiny dark brown, yellow to light brown
Streak
Light grey to white
Hardness
8 - 9 , Extremely hard
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Chemical Properties of Ferronigerite-2n1s
Formula
(Al,Fe,Zn)2(Al,Sn)6O11(OH)
Elements listed
Al, Fe, H, O, Sn, Zn
Characteristics of Ferronigerite-2n1s
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Characteristics of Ferronigerite-2n1s
Ferronigerite-2N1S possesses no prominent cleavage but does possess a weak basal cleavage. It has a light grey to white streak, and often is shiny dark brown in color. Although the color can also be yellow to light brown. The variance of color is due to the individual composition to the mineral and where it is found geologically. It has a relative hardness of 8-9 on Mohs relative hardness scale.
Composition of Ferronigerite-2n1s
Ferronigerite-2N1S crystallizes in the trigonal 32/m crystal class and a space group of P3m1. It exhibits two types of close pack structures: cubic close packed and hexagonal close packed. This results in ferronigerite-2N1S looking like simple hexagonal plates.
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