Horsfordite Mineral Data

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General Horsfordite Information

Chemical Formula:

Cu5Sb

Composition:

Molecular Weight = 503.03 gm

Copper 75.80 % Cu

Antimony 24.20 % Sb

______

100.00 %

Empirical Formula:

Cu₆Sb

Environment:

A questionable species. Horsfordite (1888) is now considered a metallurgical product.

IMA Status:

Discredited IMA 2006 - Valid Species (Pre-IMA) 1855

Locality:

Mytilene, Lesbos Island, Greece. Link to MinDat.org Location Data.

Name Origin:

Named for Eben N. Horsford, (1818-1893), U.S. chemist.

Name Pronunciation:

Horsfordite + Pronunciation

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Horsfordite Crystallography

Crystal System:

IsometricSpace Group: Unk

Physical Properties of Horsfordite

Cleavage:

None

Color:

Gray, Silver white.

Density:

8.8

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Tarnishes - Freshly fractured surfaces form a surface oxidation film

Hardness:

4-5 - Fluorite-Apatite

Luster:

Metallic

Streak:

silver white

Optical Properties of Horsfordite

RL Color:

Slightly cream colored to silver-blue and grayish white.

Calculated Properties of Horsfordite

Electron Density:

Bulk Density (Electron Density)=7.87 gm/cc
note: Specific Gravity of Horsfordite =8.80 gm/cc.

Fermion Index:

Fermion Index = 0
Boson Index = 1

Photoelectric:

PE_Horsfordite= 115.10 barns/electron
U=PE_Horsfordite x rElectron Density= 906.09 barns/cc.

Radioactivity:

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

Horsfordite Classification

Dana Class:

02.01.02.01 (02)Sulfides - Including Selenides and Tellurides

(02.01)where Am Xp, with m:p>3:1

(02.01.02)Dana Group

02.01.02.01 Horsfordite? Cu5Sb Unk Cubic

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 -Antimonide

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 Horsfordite Information

References:

NAME( Dana8) PHYS. PROP.(Ford32) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Horsfordite :
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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Print or Cut-and-Paste your Horsfordite Specimen Label here :

Horsfordite

Cu5Sb
Dana No: 02.01.02.01 Strunz No: 02.XX.00
Locality:

Notes: