Jeromite Mineral Data

General Jeromite Information

Chemical Formula:

As(S,Se)2

Composition:

Molecular Weight = 162.50 gm

Arsenic 46.11 % As

Selenium 24.30 % Se

Sulfur 29.60 % S

______

100.00 %

Empirical Formula:

AsS_1.5Se_0.5

Environment:

Sublimate of burning sulfide ores in a mine fire. Jeromite (1928) is amorphous As-S-Se phase of variable composition and does not fit the current criteria of a valid mineral species .

IMA Status:

Discredited IMA 2006 - Valid Species (Pre-IMA) 1928

Locality:

United Verde Mine, Jerome, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Name Pronunciation:

Jeromite

Jeromite Image

Images:

Jeromite

Comments: Orange, powdery jeromite on matrix.
Location: Salar de Surire, Tarapaca, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Jeromite Crystallography

Crystal System:

Amorphous- No Crystals

Physical Properties of Jeromite

Color:

Cherry red, Red, Black.

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Streak:

reddish black

Calculated Properties of Jeromite

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Jeromite= 53.13 barns/electron
U=PE_Jeromite x rElectron Density= . barns/cc.

Radioactivity:

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

Jeromite Classification

Dana Class:

02.12.12.01 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.12)Dana Group

02.12.12.01 Jeromite? As(S,Se)2 None

Strunz Class:

02.XX.00 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.X - Unclassified Strunz SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarse

02.XX -Sulfide, Se

02.XX.00 Isochalcopyrite? Cu8Fe9S16 Unk Cubic

02.XX.00 Bayankhanite? Cu6HgS4 Unk Hex

02.XX.00 Bravoite? (Fe,Ni,Co)S2 P a3 2/m 3

02.XX.00 Dzhezkazganite* (Pb,Cu,Rh)S2(?) P a3? 2/m 3

02.XX.00 Dilithium* Li2Te P 222 2 2 2

02.XX.00 Horobetsuite* (Bi,Sb)2S3 Pbnm 2/m 2/m 2/m

02.XX.00 Horsfordite? Cu5Sb Unk Cubic

02.XX.00 Kurilite? (Ag,Au)2(Te,Se,S) P m3n,P 4₃n Cubic

02.XX.00 Imgreite? NiTe P 6₃/mmc 6/m 2/m 2/m

02.XX.00 Matraite? ZnS R 3m 3m

02.XX.00 Iridisite* (Ir,Cu,Rh,Ni,Pt)S2 Unk Cubic

02.XX.00 Kitaibelite? Ag10PbBi30S51 Mono ? Mono

02.XX.00 Jeromite? As(S,Se)2 None

02.XX.00 Parajamesonite? Pb4FeSb6S14 Unk Ortho

02.XX.00 Volfsonite* Cu10CuFeFe2Sn3S16 P 4₂m-,P 42₁2 Tetra

02.XX.00 Prassoite Rh17S15(?) P m3m 4/m 3 2/m

02.XX.00 Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono

02.XX.00 Samaniite Cu2Fe5Ni2S8 P 4₁/mmm 4mm

02.XX.00 Tazieffite! Pb20Cd2(As,Bi)22S50Cl10 C 2/c 2/m

02.XX.00 Horomanite Fe6Ni3S8 P 4/mmm 4mm

Other Jeromite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

See Also:

Links to other databases for Jeromite :
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

Search for Jeromite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Jeromite :

Ask about Jeromite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Jeromite

As(S,Se)2
Dana No: 02.12.12.01 Strunz No: 02.XX.00
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.