Mackinawite Mineral Data (original) (raw)
General Mackinawite Information
(Fe,Ni)S0.9
Molecular Weight = 85.42 gm
Iron 49.04 % Fe
Nickel 17.18 % Ni
Sulfur 33.79 % S
______
100.00 %
Fe2+0.75Ni0.25S0.9
Serpentinization of ultrabasic rocks.
Approved IMA 1962
Mackinaw mine, Snohomish County, Washington, USA. Link to MinDat.org Location Data.
Named for the locality.
ICSD 81087
PDF 24-73
Mackinawite Image
Mackinawite Crystallography
a:c = 1:1.36887
a = 3.676, c = 5.032, Z = 2; V = 68.00 Den(Calc)= 4.17
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm
By Intensity(I/Io): 5.03(1), 2.31(0.8), 2.97(0.8),
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drag2 - RMB Resize/Rotate
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| | Lennie A R , Redfern S A T , Schofield P F , Vaughan D J , Mineralogical Magazine , 59 (1995) p.677-683, Synthesis and Rietveld crystal structure refinement of mackinawite, tetragonal, FeS, Locality: synthetic | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Mackinawite
{001} Perfect
Bronze, White gray.
Opaque
Anhedral Grains - Granular minerals without the expression of crystal shapes
Microscopic Crystals - Crystals visible only with microscopes.
2.5 - Finger Nail
Metallic
black
Optical Properties of Mackinawite
Extreme.
Strong.
Standardized Intensity (100%) Reflection Spectra of Mackinawite in Air
λ | R1 | R 2 | ∑ R1(λ) | ∑ R2(λ) | |
---|---|---|---|---|---|
400 nm | 21.00 | 35.50 | |||
420 nm | 21.00 | 37.20 | |||
440 nm | 21.00 | 38.90 | |||
460 nm | 21.00 | 40.40 | |||
480 nm | 21.10 | 41.80 | |||
500 nm | 21.20 | 43.10 | |||
520 nm | 21.30 | 44.30 | |||
540 nm | 21.60 | 45.30 | |||
560 nm | 21.90 | 46.10 | |||
580 nm | 22.20 | 46.90 | |||
600 nm | 22.60 | 47.40 | |||
620 nm | 22.90 | 47.80 | |||
640 nm | 23.30 | 48.20 | |||
660 nm | 23.80 | 48.50 | |||
680 nm | 24.30 | 48.80 | |||
700 nm | 24.90 | 49.10 |
Calculated Relative Intensity Colors of Mackinawite in Air
RelativeIntensity | 0% | 50% | 100% | 150% | 200% | 250% | 300% | 350% | 400% | 420% |
---|---|---|---|---|---|---|---|---|---|---|
R1 | ||||||||||
R2 |
Calculated Properties of Mackinawite
Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Mackinawite =4.17 gm/cc.
Fermion Index = 0.01
Boson Index = 0.99
PEMackinawite = 23.63 barns/electron
U=PEMackinawite x rElectron Density= 94.38 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mackinawite is Not Radioactive
Mackinawite Classification
02.07.02.01 (02)Sulfides - Including Selenides and Tellurides
(02.07)where Am Bn Xp, with (m+n):p=9:8
(02.07.02)Dana Group
02.07.02.01 Mackinawite (Fe,Ni)S0.9 P 4/nmm 4/m 2/m 2/m
02.07.02.02 Sugakiite! Cu(Fe,Ni)8S8 P 41/mnm 4/m 2/m 2/m
02.CC.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
02.C - Metal Sulfides, M:S = 1:1 (and similar)
02.CC -With Ni, Fe, Co, PGE, etc.
02.CC.25 Mackinawite (Fe,Ni)S0.9 P 4/nmm 4/m 2/m 2/m
Other Mackinawite Information
PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Links to other databases for Mackinawite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Ask about Mackinawite here :
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Print or Cut-and-Paste your Mackinawite Specimen Label here :
Mackinawite
(Fe,Ni)S0.9
Dana No: 02.07.02.01 Strunz No: 02.CC.25
Locality:
Notes: