Gianellaite Mineral Data

General Gianellaite Information

Chemical Formula:

Hg4(SO4)N2

Composition:

Molecular Weight = 926.44 gm

Mercury 86.61 % Hg 90.06 % Hg₂O

Sulfur 3.46 % S 8.64 % SO₃

Nitrogen 3.02 % N 5.62 % (NH₄)₂O

Oxygen 6.91 % O

______ ______

100.00 % 104.32 % = TOTAL OXIDE

Empirical Formula:

Hg₄(SO₄)N₂

Environment:

Secondary mineral coating fracture surfaces in oxidized portions of a hydrothermal mercury deposit, the nitrogen likely derived from decaying organic matter.

IMA Status:

Approved IMA 1977

Locality:

Perry pit, Mariposa mine, Terlingua district, Brewster Co., Texas. Link to MinDat.org Location Data.

Name Origin:

Named for Vincent Paul Gianella (1886-1983), Head of the Department of Geology, MacKay School of Mines, University of Nevada, Reno, Nevada, USA.

Name Pronunciation:

Gianellaite + Pronunciation

Gianellaite Image

Images:

Gianellaite

Comments: Yellow crystalline coatings of gianellaite on calcite.
Location: Mariposa Mine, Terlingua, Brewster County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gianellaite Crystallography

Cell Dimensions:

a = 9.5215, Z = 4; V = 863.21 Den(Calc)= 7.13

Crystal System:

Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F43m

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

By Intensity(I/I_o): 2.743(1), 2.872(1), 5.511(0.8),

Physical Properties of Gianellaite

Color:

Yellow, Straw yellow.

Density:

7.19

Hardness:

3 - Calcite

Streak:

light yellow

Optical Properties of Gianellaite

Gladstone-Dale:

CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1522,KPDmeas= 0.1509,KC= 0.145
Ncalc = 2.03 - 2.04

Optical Data:

Isotropic, n=2.085.

Calculated Properties of Gianellaite

Electron Density:

Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Gianellaite =7.19 gm/cc.

Fermion Index:

Fermion Index = 0.29
Boson Index = 0.71

Photoelectric:

PE_Gianellaite=1,486.72 barns/electron
U=PE_Gianellaite x rElectron Density=8,815.30 barns/cc.

Radioactivity:

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

Gianellaite Classification

Dana Class:

28.02.04.01 (28)Anhydrous Acid and Sulfates

(28.02)(A+)2 XO4

(28.02.04)Dana Group

28.02.04.01 Gianellaite Hg4(SO4)N2 F43m 4 3m

Strunz Class:

03.DD.30 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DD -With Hg

03.DD.30 Gianellaite Hg4(SO4)N2 F43m 4 3m

03.DD.30 Mosesite Hg2N(Cl,SO4,MoO4,CO3)•(H2O) F43m 4 3m

Other Gianellaite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Gianellaite :
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 Gianellaite Specimen Label here :

Gianellaite

Hg4(SO4)N2
Dana No: 28.02.04.01 Strunz No: 03.DD.30
Locality:

Notes:

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