Rayite Mineral Data (original) (raw)

General Rayite Information

Help on Chemical Formula: Chemical Formula:

(Ag,Tl)2Pb8Sb8S21

Help on Composition: Composition:

Molecular Weight = 3,568.98 gm

Thallium 2.86 % Tl

Silver 4.53 % Ag

Antimony 27.29 % Sb

Lead 46.44 % Pb

Sulfur 18.87 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Ag1.5Tl0.5Pb8Sb8S21

Help on Environment: Environment:

In Precambrian polymetallic massive-sufide deposits interbedded with kyanite-graphite schists, diopside-bearing calcsilicates, and meta cherts.

Help on IMA Status: IMA Status:

Approved IMA 1983

Help on Locality: Locality:

Rajpura-Darib, Udaipur district, Rajasthan, India. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Santosh K. Ray of President College, Calcutta, India.

Help on Name Pronunciation: Name Pronunciation:

Rayite Say RAYITE

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Rayite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.1371:1:2.0476

Help on Cell Dimensions: Cell Dimensions:

a = 13.6, b = 11.96, c = 24.49, Z = 4; beta = 103.94° V = 3,866.13 Den(Calc)= 6.13

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.37(1), 3.26(0.9), 3.9(0.3),

Physical Properties of Rayite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Lead gray, Gray.

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Habit: Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Help on Habit: Habit:

Tabular - Form dimensions are thin in one direction.

Help on Hardness: Hardness:

2.5 - Finger Nail

Help on Luster: Luster:

Metallic

Help on Streak: Streak:

lead gray

Optical Properties of Rayite

Help on RL Anisotrophism: RL Anisotrophism:

Perceptible, from dark blue to dark reddish brown.

Help on RL Color: RL Color:

White with greenish and bluish tints.

Help on RL Pleochroism: RL Pleochroism:

Greenish to greenish blue.

Help on Reflectivity Reflectivity

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

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
400 nm 38.30 41.80
420 nm 38.00 41.30
440 nm 37.80 40.90
460 nm 37.60 40.60
480 nm 37.60 40.40
500 nm 37.50 40.10
520 nm 37.50 39.90
540 nm 37.50 39.60
560 nm 37.40 39.40
580 nm 37.20 38.90
600 nm 37.00 38.40
620 nm 36.70 37.90
640 nm 36.30 37.50
660 nm 35.90 37.30
680 nm 35.60 37.20
700 nm 35.30 37.10

Calculated Relative Intensity Colors of Rayite in Air

RelativeIntensity 0% 30% 60% 90% 100% 120% 150% 180% 210% 240%
R1
R2

Calculated Properties of Rayite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=5.19 gm/cc
note: Specific Gravity of Rayite =6.13 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Help on Photoelectric: Photoelectric:

PERayite = 999.89 barns/electron
U=PERayite x rElectron Density=5,189.93 barns/cc.

Help on Radioactivity: Radioactivity:

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

Rayite Classification

Help on Dana Class: Dana Class:

03.06.20.05 (03)Sulfides - Sulfosalts

(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.06.20)Fuloppite Group (Monoclinc: C2/c containing Pb, Sb)

03.06.20.01 Fuloppite Pb3Sb8S15 C 2/c 2/m

03.06.20.02 Plagionite Pb5Sb8S17 C 2/c 2/m

03.06.20.03 Heteromorphite Pb7Sb8S19 C 2/c 2/m

03.06.20.04 Semseyite Pb9Sb8S21 C 2/c 2/m

03.06.20.05 Rayite (Ag,Tl)2Pb8Sb8S21 C 2/c 2/m

Help on Strunz Class: Strunz Class:

02.HC.10d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HC -With only Pb

02.HC.10d Semseyite Pb9Sb8S21 C 2/c 2/m

02.HC.10d Rayite (Ag,Tl)2Pb8Sb8S21 C 2/c 2/m

Other Rayite Information

Help on References: References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

Help on See Also: See Also:

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

Rayite

(Ag,Tl)2Pb8Sb8S21
Dana No: 03.06.20.05 Strunz No: 02.HC.10d
Locality:

Notes: