Jeromite Mineral Data

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. Does not fit the current criteria of a valid mineral species.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

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

Name Origin:

Named for the locality

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 = 0.02068
Boson Index = 0.97932

Photoelectric:

PE_Jeromite= 53.13 barns/electron
U=PE_Jeromite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jeromite is Not Radioactive

Jeromite Classification

Dana Class:

2.12.12.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.12)Dana Group

2.12.12.1 Jeromite As(S,Se)2 None

Strunz Class:

II/F.02-90 II - Sulfides and sulphosalts

II/F - Sulfides with nonmetallic properties, Arsenic-Sulfides

II/F.02 - Duranusite - Jeromite series

II/F.02-10 Duranusite As4S Unk Ortho

II/F.02-20 Dimorphite As4S3 P nma 2/m 2/m 2/m

II/F.02-30 Realgar AsS P 2₁/n 2/m

II/F.02-40 Pararealgar AsS P 2₁/c 2/m

II/F.02-50 Alacranite As8S9 P 2/c 2/m

II/F.02-60 Uzonite As4S5 P 2₁/m 2/m

II/F.02-70 Orpiment As2S3 P 2₁/n 2/m

II/F.02-80 Laphamite As2(Se,S)3 P 2₁/n 2/m

II/F.02-90 Jeromite As(S,Se)2 None

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Jeromite

As(S,Se)2
Dana No: 2.12.12.1 Strunz No: II/F.02-90
Locality:

Notes: