Edgarbaileyite Mineral Data

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General Edgarbaileyite Information

Chemical Formula:

Hg+6Si2O7

Composition:

Molecular Weight = 1,371.71 gm

Silicon 4.09 % Si 8.76 % SiO₂

Mercury 87.74 % Hg 91.24 % Hg₂O

Oxygen 8.16 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Hg₆Si₂O₇

Environment:

Secondary mineral in mercury mine.

IMA Status:

Approved IMA 1990

Locality:

Terlingua, Brewster County, Texas and Socrates mine, Sonoma County, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Edgar Bailey (1914-1983), distinguished geologist and mercury commodity specialist.

Name Pronunciation:

Edgarbaileyite + Pronunciation

Synonym:

ICSD 69123

IMA1988-028

PDF 45-1438

Edgarbaileyite Image

Images:

Edgarbaileyite

Comments: Resinous yellow masses of edgarbaileyite in quartz.
Location: Clear Creek Mine, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Edgarbaileyite Crystallography

Axial Ratios:

a:b:c =1.5231:1:0.7751

Cell Dimensions:

a = 11.725, b = 7.698, c = 5.967, Z = 2; beta = 112.07° V = 499.11 Den(Calc)= 9.13

Crystal System:

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

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

By Intensity(I/I_o): 3.16(1), 2.715(0.63), 1.872(0.36),

Crystal Structure:

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Angel R J , Cressey G , Criddle A J , American Mineralogist , 75 (1990) p.1192-1196, Edgarbaileyite, Hg6Si2O7: The crystal structure of the first mercury silicate

Physical Properties of Edgarbaileyite

Cleavage:

None

Color:

Yellow, Orangish yellow, Dark olive green, Yellowish green, Dark green brown.

Density:

9.4

Diaphaneity:

Translucent to Opaque

Fracture:

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

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Resinous

Streak:

yellow green

Optical Properties of Edgarbaileyite

Gladstone-Dale:

CI meas= 0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1468,KPDmeas= 0.1426,KC= 0.1496
Ncalc = 2.37 - 2.41

Optical Data:

Biaxial (?), a=2.1, g=2.58, bire=0.4800

Pleochroism (x):

lemon yellow.

Pleochroism (y):

deeper lemon yellow.

RL Bireflectance:

Weak to strong.

RL Color:

Gray to light gray with pale lemon-yellow internal reflections..

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Edgarbaileyite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	16.70	20.20
410 nm	16.90	19.85
420 nm	17.10	19.50
430 nm	17.20	19.30
440 nm	17.00	19.20
450 nm	16.75	19.00
460 nm	16.40	18.80
470 nm	16.10	18.50
480 nm	15.80	18.20
490 nm	15.50	18.00
500 nm	15.30	17.70
510 nm	15.10	17.50
520 nm	14.90	17.30
530 nm	14.70	17.00
540 nm	14.60	16.80
550 nm	14.50	16.65
560 nm	14.30	16.50
570 nm	14.20	16.40
580 nm	14.20	16.20
590 nm	14.10	16.10
600 nm	14.00	16.00
610 nm	14.00	15.95
620 nm	13.95	15.90
630 nm	13.90	15.80
640 nm	13.85	15.80
650 nm	13.80	15.70
660 nm	13.75	15.60
670 nm	13.70	15.55
680 nm	13.70	15.50
690 nm	13.60	15.50
700 nm	3.34	4.39

**Standardized Intensity (100%) Reflection Spectra of Edgarbaileyite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	5.32	7.42
410 nm	5.43	7.20
420 nm	5.53	7.02
430 nm	5.53	6.93
440 nm	5.38	6.83
450 nm	5.18	6.83
460 nm	4.91	6.48
470 nm	4.69	6.24
480 nm	4.50	6.03
490 nm	4.34	5.85
500 nm	4.21	5.70
510 nm	4.13	5.57
520 nm	4.07	5.47
530 nm	4.00	5.37
540 nm	3.93	5.26
550 nm	3.87	5.15
560 nm	3.81	4.53
570 nm	3.75	4.97
580 nm	3.71	4.90
590 nm	3.65	4.83
600 nm	3.61	4.77
610 nm	3.58	4.72
620 nm	3.54	4.68
630 nm	3.52	4.65
640 nm	3.50	4.60
650 nm	3.48	4.57
660 nm	3.46	4.53
670 nm	3.41	4.48
680 nm	3.39	4.44
690 nm	3.38	4.41
700 nm	3.34	4.39

**Calculated Relative Intensity Colors of Edgarbaileyite in Air**
Relative Intensity	0%	70%	100%	140%	210%	280%	350%	420%	490%	560%	630%	640%
R₁
R₂

**Calculated Relative Intensity Colors of Edgarbaileyite in Oil**
Relative Intensity	0%	100%	200%	300%	400%	500%	600%	700%	800%	900%	1000%
R₁
R₂

Calculated Properties of Edgarbaileyite

Electron Density:

Bulk Density (Electron Density)=7.51 gm/cc
note: Specific Gravity of Edgarbaileyite =9.13 gm/cc.

Fermion Index:

Fermion Index = 0.26
Boson Index = 0.74

Photoelectric:

PE_{Edgarbaileyite}=1,510.38 barns/electron
U=PE_{Edgarbaileyite} x rElectron Density=11339.79 barns/cc.

Radioactivity:

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

Edgarbaileyite Classification

Dana Class:

55.05.01.01 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions

(55.05)with dimeric cations

(55.05.01)Dana Group

55.05.01.01 Edgarbaileyite Hg6Si2O7 C 2/m 2/m

Strunz Class:

09.BC.25 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BC -Si2O7 groups, without non-tetrahedral anions;

09.BC.25 Edgarbaileyite Hg6Si2O7 C 2/m 2/m

Other Edgarbaileyite Information

See Also:

Links to other databases for Edgarbaileyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Edgarbaileyite

Hg+6Si2O7
Dana No: 55.05.01.01 Strunz No: 09.BC.25
Locality:

Notes: