Danielsite Mineral Data

Danielsite Mineral Data +

General Danielsite Information

Chemical Formula:

(Cu,Ag)14HgS8

Composition:

Molecular Weight = 1,524.05 gm

Copper 41.70 % Cu

Silver 28.31 % Ag

Mercury 13.16 % Hg

Sulfur 16.83 % S

______

100.00 %

Empirical Formula:

Cu₁₀Ag₄HgS₈

Environment:

In a gossen pod in a quartz vein, as a weathering product derived from other sulfides.

IMA Status:

Approved IMA 1987

Locality:

Coppin Pool, WA, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for John L. Daniels (1931-), who collected the mineral.

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Danielsite Crystallography

Axial Ratios:

a:b:c =1.0505:1:1.9777

Cell Dimensions:

a = 9.644, b = 9.18, c = 18.156, Z = 4; V = 1,607.39 Den(Calc)= 6.30

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 2.622(1), 1.875(0.6), 1.959(0.6),

Physical Properties of Danielsite

Color:

Gray, Steel gray.

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Metallic

Optical Properties of Danielsite

RL Anisotrophism:

Moderate, in shades of gray.

RL Color:

Gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Danielsite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	32.00	34.00
546 nm	30.00	31.00
589 nm	28.00	30.00
650 nm	27.00	29.00

**Calculated Relative Intensity Colors of Danielsite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%
R₁
R₂

Calculated Properties of Danielsite

Electron Density:

r_electron=5.67 gm/cc
note: r_Danielsite=6.30 gm/cc.

Fermion Index

Fermion Index = 0.04101
Boson Index = 0.95899

Photoelectric:

PE_Danielsite= 299.05 barns/electron
U=PE_Danielsite x r_electron=1,696.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Danielsite is Not Radioactive

Danielsite Classification

Dana Class:

2.16.7.2 (2)Sulfides - Including Selenides and Tellurides

(2.16)with miscellaneous formulae

(2.16.7)Dana Group

2.16.7.1 Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2

2.16.7.2 Danielsite (Cu,Ag)14HgS8 Unk Ortho

Strunz Class:

II/B.09-10 II - Sulfides and sulphosalts

II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Complex Sulfides and Selenides with predominant Copper, Mercury and Thallium

II/B.09 - Danielsite - Furotobeite series

II/B.09-10 Danielsite (Cu,Ag)14HgS8 Unk Ortho

II/B.09-20 Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2

II/B.09-30 Bayankhanite* Cu6HgS4 Unk Hex

II/B.09-40 Furutobeite (Cu,Ag)6PbS4 Cm ? m

II/B.09-50 Schlemaite! (Cu,[])6(Pb,Bi)Se4 P 2₁/m 2/m

Other Danielsite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p401-403,1987) OPTIC PROP.(AntBidBlaNic1)

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

Danielsite

(Cu,Ag)14HgS8
Dana No: 2.16.7.2 Strunz No: II/B.09-10
Locality:

Notes: