Chenguodaite Mineral Data (original) (raw)

General Chenguodaite Information

Help on Chemical Formula: Chemical Formula:

Ag9FeTe2S4

Help on Composition: Composition:

Molecular Weight = 1,406.90 gm

Iron 3.97 % Fe

Silver 68.77 % Ag

Tellurium 18.05 % Te

Sulfur 9.21 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Ag8.97Fe2+Te1.99S4.04

Help on Environment: Environment:

Occurs in high grade Au-Ag-Cu ores.

Help on IMA Status: IMA Status:

Approved IMA 2005 (Dana # Added)

Help on Locality: Locality:

Bunan deposit, Shandong Province, People�s Republic of China. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Chen Guoda (1912-2004), geologist and the founder of the Geological Department of Central South University, China.

Help on Synonym: Synonym:

IMA2004-042a

Chenguodaite Image

Click Here for Larger Chenguodaite Image in a New Browser Window Images:

Click Here for Larger Chenguodaite Image Chenguodaite Comments: BSE Image of coexisting chenguodaite (U1) and galena (Gn), part of the grain is extracted for Gandolfi camera diffraction. (Chinese Science Bulletin 2008, 53(22)). Location: Bunan deposit, Shandong Province, People’s Republic of China.Scale: See Image. © Chinese Science Bulletin

Chenguodaite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.8619:1:1.0951

Help on Cell Dimensions: Cell Dimensions:

a = 12.769, b = 14.814, c = 16.223, Z = 9; V = 3,068.74 Den(Calc)= 6.85

Help on Crystal System: Crystal System:

OrthorhombicSpace Group: Ortho

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.265(1), 2.188(0.71), 6.726(0.69),6.416(0.39), 1.949(0.33), 5.951(0.33), 2.123(0.31), 2.981(0.24),

Physical Properties of Chenguodaite

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Help on Habit: Habit:

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

Help on Hardness: Hardness:

2-3 - Gypsum-Calcite

Help on Luster: Luster:

Metallic

Help on Streak: Streak:

black

Optical Properties of Chenguodaite

Help on RL Anisotrophism: RL Anisotrophism:

Light gray with no internal reflections.

Help on RL Color: RL Color:

None.

Help on RL Pleochroism: RL Pleochroism:

None.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Chenguodaite in Air

λ R ∑ R(λ)
400 nm 22.10
420 nm 27.20
440 nm 28.00
460 nm 27.90
470 nm 27.80
480 nm 27.60
500 nm 27.00
520 nm 26.20
540 nm 25.70
546 nm 25.80
560 nm 25.50
580 nm 25.30
589 nm 25.30
600 nm 25.40
620 nm 25.40
640 nm 25.40
650 nm 25.60
660 nm 25.70
680 nm 25.70
700 nm 25.80

Calculated Relative Intensity Colors of Chenguodaite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 350%
R

Calculated Properties of Chenguodaite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.00 gm/cc
note: Specific Gravity of Chenguodaite =6.85 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEChenguodaite = 244.19 barns/electron
U=PEChenguodaite x rElectron Density=1,464.06 barns/cc.

Help on Radioactivity: Radioactivity:

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

Chenguodaite Classification

Help on Dana Class: Dana Class:

03.07.20.01 (03)Sulfides - Sulfosalts

(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.07.20)Dana Group

03.07.20.01 Chenguodaite! Ag9FeTe2S4 Ortho Ortho

Help on Strunz Class: Strunz Class:

02.BA.60 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BA -With Cu, Ag, Au

02.BA.60 Chenguodaite! Ag9FeTe2S4 Ortho Ortho

Other Chenguodaite Information

Help on References: References:

NAME( Chinese Science Bulletin 2008, 53(22)) PHYS. PROP.( Chinese Science Bulletin 2008, 53(22)) OPTIC PROP.( Chinese Science Bulletin 2008, 53(22))

Help on See Also: See Also:

Links to other databases for Chenguodaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Chenguodaite

Ag9FeTe2S4
Dana No: 03.07.20.01 Strunz No: 02.BA.60
Locality:

Notes: