Coyoteite Mineral Data

General Coyoteite Information

Chemical Formula:

NaFe3S5•2(H2O)

Composition:

Molecular Weight = 386.89 gm

Sodium 5.94 % Na

Iron 43.30 % Fe

Hydrogen 1.04 % H

Sulfur 41.44 % S

Oxygen 8.27 % O

______

100.00 %

Empirical Formula:

NaFe²⁺₃S₅•2(H₂O)

Environment:

Mafic alkalic diatreme.

IMA Status:

Approved IMA 1983

Locality:

Coyote Peak diatreme, 16 miles SW of Orick, Humboldt Co. California. Link to MinDat.org Location Data.

Name Origin:

Named after it's locality.

Coyoteite Image

Images:

Coyoteite

Comments: Black and white image of a polished section showing coyoteite crystals showing chevron pattern developed by opposing cleavage sets. Continuous parallel lines are polishing scratches. (AmMin 68:252).
Location: Coyote Peak mafic alkalic diatreme near Orick, Humboldt County, California. USA. Scale: Image size 0.26 mm.
© American Mineralogist

Coyoteite Crystallography

Axial Ratios:

a:b:c =0.7498:1:0.6518

Cell Dimensions:

a = 7.409, b = 9.881, c = 6.441, Z = 2; alpha = 100.417°, beta = 104.617°, gamma = 81.483° V = 443.80 Den(Calc)= 2.90

Crystal System:

TriclinicSpace Group: P1,P 1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.12(1), 7.13(0.9), 3.028(0.8),

Physical Properties of Coyoteite

Cleavage:

{111} Perfect, {111} Perfect, {111} Perfect

Color:

Black.

Density:

2.879

Diaphaneity:

Opaque

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Metallic

Magnetism:

Moderately Magnetic

Streak:

black

Optical Properties of Coyoteite

RL Anisotrophism:

Strong, colors from gray to dull golden orange.

RL Color:

Pale brownish gray with a pink tint.

RL Pleochroism:

Faint, from gray to pink.

Calculated Properties of Coyoteite

Electron Density:

Bulk Density (Electron Density)=2.81 gm/cc
note: Specific Gravity of Coyoteite =2.88 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Coyoteite= 15.21 barns/electron
U=PE_Coyoteite x rElectron Density= 42.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coyoteite is Not Radioactive

Coyoteite Classification

Dana Class:

02.14.06.01 (02)Sulfides - Including Selenides and Tellurides

(02.14)(Hydroxyl or Hydrated)

(02.14.06)Dana Group

02.14.06.01 Coyoteite NaFe3S5•2(H2O) P1,P 1 Tri

Strunz Class:

02.FD.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O

02.FD -With O, OH, H2O

02.FD.25 Coyoteite NaFe3S5•2(H2O) P1,P 1 Tri

Other Coyoteite Information

References:

NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Coyoteite :
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 Coyoteite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Coyoteite Specimen Label here :

Coyoteite

NaFe3S5•2(H2O)
Dana No: 02.14.06.01 Strunz No: 02.FD.25
Locality:

Notes: