Aurivilliusite Mineral Data

General Aurivilliusite Information

Chemical Formula:

Hg+Hg++OI

Composition:

Molecular Weight = 541.59 gm

Mercury 74.07 % Hg 38.51 % Hg₂O / 39.99 % HgO

Iodine 22.73 % I 22.73 % I

- % I -1.43 % -O=I₂

Bromine 0.15 % Br 0.15 % Br

- % Br -0.01 % -O=Br₂

Chlorine 0.07 % Cl 0.07 % Cl

- % Cl -0.01 % -O=Cl₂

Oxygen 2.98 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

HgHgO_1.01I_0.97Br_0.01Cl_0.01

Environment:

In a cm-wide quartz vein with other mercury compounds. Related to terlinguaite; new structure type.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

A small prospect pit near the long-abandoned Clear Creek mercury mine, New Idria district, San Benito County, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Karin Aurivillius (1920-1982), chemist-crystallographer at the University of Lund, Sweden, who determined the crystal structure of numerous synthetic Hg compounds.

Synonym:

IMA2002-022

Aurivilliusite Image

Images:

Aurivilliusite

Comments: Dark reddish brown aurivilliusite-bearing â€˜splatteredâ€™ patch on quartz.
Location: Clear Creek claim, San Benito County, California, USA. Scale: See Image.
© Mineralogical Magazine

Aurivilliusite Crystallography

Axial Ratios:

a:b:c =2.5189:1:0.959

Cell Dimensions:

a = 17.58, b = 6.979, c = 6.693, Z = 8; beta = 101.71° V = 804.08 Den(Calc)= 8.95

Crystal System:

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

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

By Intensity(I/I_o): 3.275(1)(002), 2.873(0.8)(600), 2.993(0.8)(221),8.547(0.7)(200), 1.878(0.5)(223), 2.404(0.5)(602,421,222),

Physical Properties of Aurivilliusite

Cleavage:

{100} Distinct

Color:

Dark gray black.

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Luster:

Metallic

Streak:

dark red brown

Optical Properties of Aurivilliusite

Optical Data:

NCalc= 2.4 - from Gladstone-Dale relationship (KC = 0.1568) where Ncalc=Dcalc*KC+1

RL Color:

Resembles cinnabar, light sensitive, no internal reflections, shows red light coalescing phenomenon.

Calculated Properties of Aurivilliusite

Electron Density:

Bulk Density (Electron Density)=7.27 gm/cc
note: Specific Gravity of Aurivilliusite =8.95 gm/cc.

Fermion Index:

Fermion Index = 0.22
Boson Index = 0.78

Photoelectric:

PE_{Aurivilliusite}=1,384.79 barns/electron
U=PE_{Aurivilliusite} x rElectron Density=10069.53 barns/cc.

Radioactivity:

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

Aurivilliusite Classification

Dana Class:

10.04.02.02 (10)Oxyhalides and Hydroxyhalides

(10.04)where (A)2 (O,OH) Xq

(10.04.02)Terlinguaite Group

10.04.02.01 Terlinguaite HgHgClO C 2/c 2/m

10.04.02.02 Aurivilliusite! HgHgOI C 2/m 2/m

Strunz Class:

03.DD.50 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DD -With Hg

03.DD.50 Aurivilliusite! HgHgOI C 2/m 2/m

Other Aurivilliusite Information

References:

NAME( CanMin, 42:1904) PHYS. PROP.(CanMin, 42:1904) OPTIC PROP.(CanMin, 42:1904)

See Also:

Links to other databases for Aurivilliusite :
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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Aurivilliusite

Hg+Hg++OI
Dana No: 10.04.02.02 Strunz No: 03.DD.50
Locality:

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