As well-formed thin tabular crystals; massive, fine-feathery
Cleavage
Perfect on {001}
Mohs scale hardness
2.5
Luster
Metallic
Streak
Black
Diaphaneity
Opaque
Specific gravity
4.17
References
[2][3][4][5]
Mackinawite is an iron nickel sulfide mineral with the chemical formula (Fe,Ni) 1+xS (where x = 0 to 0.11). The mineral crystallizes in the tetragonal crystal system and has been described as a distorted, close packed, cubic array of S atoms with some of the gaps filled with Fe.[6] Mackinawite occurs as opaque bronze to grey-white tabular crystals and anhedral masses. It has a Mohs hardness of 2.5 and a specific gravity of 4.17. It was first described in 1962 for an occurrence in the Mackinaw mine, Snohomish County, Washington for which it was named.[5]
^Taylor, L.A.; Finger, L.W. (1970). "Structural refinement and composition of mackinawite". Carnegie Institute of Washington Geophysical Laboratory Annual Report. 69: 318–322.
Mackinawite is an iron nickel sulfide mineral with the chemical formula (Fe,Ni) 1+xS (where x = 0 to 0.11). The mineral crystallizes in the tetragonal...
or hexagonal) Troilite, FeS, the endmember of pyrrhotite (hexagonal) Mackinawite, Fe1+xS (where x = 0 to 0.1) (tetragonal) Marcasite, orthorhombic FeS2...
equivalent positions in the mineral's structure; for example, the formula of mackinawite is given as (Fe,Ni) 9S 8, meaning Fe xNi 9-xS 8, where x is a variable...
minerals have also been identified in iron sulfide magnetosomes—including mackinawite (tetragonal FeS) and a cubic FeS—which are thought to be precursors of...
concentrating organic molecules," composed of iron-sulfur minerals such as mackinawite, endowed these mineral cells with the catalytic properties envisaged...
anhydrite. The sulfides produced include nickel-rich sulfides, such as mackinawite. Laboratory experiments have confirmed that at a temperature of 300 °C...
chromite, ilmenite, magnetite, and sperrylite. It is chemically similar to mackinawite, godlevskite and horomanite. Pentlandite is synonymous with folgerite...
Ultramafic intrusive rock hosting nickel bearing sulfides (pentlandite and mackinawite) have returned values up to 0.49% nickel, 38 parts per billion (ppb)...
detectable monosulfides (≥ 0.01% acid volatile sulfide) (e.g., greigite and mackinawite). Note that monosulfidic material has not replaced Monosulfidic Black...
platinum iron ore deposits occurring with pyrrhotite, pentlandite, mackinawite, cubanite, valleriite, chalcopyrite and pyrite. Troilite is extremely...
martian meteorite Meteoric iron Fe and Ni in different ratios Maskelynite Mackinawite (Fe,Ni)1 + xS (where x = 0 to 0.11) Majorite Mg3(MgSi)(SiO4)3 Moissanite...
found on the planet Mars by the Opportunity rover on October 13, 2009 Mackinawite, an iron nickel sulfide mineral Michilimackinac, a former term for the...
association with haycockite, magnetite, troilite, cuprian pentlandite, mackinawite, sphalerite, and moncheite in the Mooihoek mine and with haycockite,...
and he found there a number of rare minerals, such as maucherite and mackinawite. Beyond his professional accomplishments, Stanko Grafenauer displayed...
acid (RNA) to form. Other theories require less common minerals such as mackinawite or greigite. A catalog of the minerals that were formed during the Hadean...
research focus on redox sensitive minerals such as magnetite, pyrite, mackinawite which structure which could have participated to the emergence of life...
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