suessite

{{Infobox mineral

| name = Suessite

| category = Iron silicide

| boxwidth =

| boxbgcolor =

| image = Suessite.jpg

| imagesize =

| caption =

| formula = Fe₃Si

| IMAsymbol = Sss{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3 |pages=291–320|doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free}}

| molweight =

| strunz = 1.BB.05

| system = Cubic

| class = Hexoctahedral (m{{overline|3}}m)
H-M symbol: (4/m {{overline|3}} 2/m)

| symmetry = Im3m

| unit cell = a = 2.841 Å; Z = 0.5

| color = Cream white in reflected light, Terrestrial is light gray with a yellow tint

| habit = forms oval accumulations, polycrystalline aggregates

| twinning =

| cleavage = None

| fracture =

| tenacity =

| mohs =

| luster =

| refractive =

| opticalprop = X-ray Wavelength = 1.541838

| birefringence =

| pleochroism =

| streak =

| gravity = 6.34

| density =

| melt =

| fusibility =

| diagnostic =

| solubility =

| diaphaneity =

| other = Ferromagnetic,

degree of disorder = 11%,

Curie point = 550°C,

magnetic moment = 4.6 μ_B,

microhardness = 531–532 kg/mm²

| references = Keil, K.,Berkley, J.L., and Fuchs, L.H. (1982) Suessite, Fe3Si: a New Mineral in the North Haig Ureilite. American Mineralogist, 67, 126.- (2010) "AMCSD Suessite." National Science Foundation . Accessed 29 September 2010.Cabris, L.J., Fleischer, M., and Pabst, A. (1981) New Mineral Names. American Mineralogist, 66, 1099.Norvgorodova, M.I., Yosopov, R.G., Dmitrieva, M.T., Tsepin, A.I., Sivtsov, A.V., Gorshkov, A.I., Korovoshkin, V.V., and Yakubovskaya, N.Y. (1984) First Occurrence of Suessite on the Earth. International Geology Review, 26, 98.

}}

Suessite is a rare iron silicide mineral with chemical formula: Fe₃Si.(2010) Suessite Glossary of Geology, American Geological Institute, . Accessed 13 September 2010. The mineral was named after Professor Hans E. Suess. It was discovered in 1982 during the chemical analysis of The North Haig olivine pigeonite achondrite (ureilite). It is a cream white color in reflected light, and ranges in size from 1 μm "blebs" to elongated grains that can reach up to 0.45 cm in length.Keil, K., Berkley, J. L., and Fuchs, L.H. (1982) Suessite, Fe3Si: a New Mineral in the North Haig Ureilite. American Mineralogist, 67, 126. This mineral belongs in the isometric crystal class. The isometric class has crystallographic axes that are all the same length and each of the three axes perpendicular to the other two. It is isotropic, has a structural type of DO3 and a crystal lattice of BiF₃.Norvgorodova, M.I., Yosopov, R.G., Dmitrieva, M.T., Tsepin, A.I., Sivtsov, A.V., Gorshkov, A.I., Korovoshkin, V.V., and Yakubovskaya, N.Y. (1984) First Occurrence of Suessite on the Earth. International Geology Review, 26, 98.