Hanawaltite Mineral Data

General Hanawaltite Information

Chemical Formula:

Hg+6Hg++[Cl,(OH)]2O3

Composition:

Molecular Weight = 1,513.81 gm

Mercury 92.75 % Hg 82.67 % Hg₂O / 14.31 % HgO

Hydrogen 0.03 % H 0.30 % H₂O

Chlorine 3.51 % Cl 3.51 % Cl

- % Cl -0.79 % -O=Cl₂

Oxygen 3.70 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Hg₆HgCl_1.5(OH)_0.5O₃

Environment:

On a fracture surface in a brecciated silica-carbonate rock composed mainly of ferroan magnesite and quartz.

IMA Status:

Approved IMA 1996

Locality:

Clear Creek claim, New Idria district, San Benito County, California, USA. Link to MinDat.org Location Data.

Name Origin:

For Dr. J. Donald Hanawalt (1903-1987), a pioneer in the field of X-ray powder diffraction.

Name Pronunciation:

Hanawaltite + Pronunciation

Synonym:

ICSD 40340

IMA1994-036

PDF 48-1869

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Hanawaltite Crystallography

Axial Ratios:

a:b:c =0.8493:1:0.4646

Cell Dimensions:

a = 11.79, b = 13.881, c = 6.45, Z = 4; V = 1,055.59 Den(Calc)= 9.52

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbma

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

By Intensity(I/I_o): 3.053(1), 5.25(0.8), 2.954(0.7),

Crystal Structure:

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Grice J D , The Canadian Mineralogist , 37 (1999) p.775-778, Redetermination of the crystal structure of hanawaltite

Physical Properties of Hanawaltite

Cleavage:

{001} Good

Color:

Black, Dark brown black, Dark red brown.

Density:

9.52

Diaphaneity:

Opaque to translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

4 - Fluorite

Luster:

Metallic

Streak:

dark reddish black

Optical Properties of Hanawaltite

Optical Data:

NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.1488) where Ncalc=Dcalc*KC+1
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.1488) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Bright metallic blue.

RL Bireflectance:

Moderate to strong.

RL Color:

Gray, may have red-orange internal reflections.

RL Pleochroism:

Weak, bright bluish gray to grayish white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Hanawaltite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	26.20	37.60
420 nm	25.20	34.80
440 nm	24.20	32.50
460 nm	23.30	30.60
480 nm	22.40	29.00
500 nm	21.80	27.70
520 nm	21.20	26.70
540 nm	20.80	25.90
560 nm	20.50	25.20
580 nm	20.30	24.60
600 nm	20.10	24.10
620 nm	20.00	23.70
640 nm	20.20	23.30
660 nm	20.30	23.10
680 nm	20.20	22.90
700 nm	20.00	22.50

**Calculated Relative Intensity Colors of Hanawaltite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	430%
R₁
R₂

Calculated Properties of Hanawaltite

Electron Density:

Bulk Density (Electron Density)=7.72 gm/cc
note: Specific Gravity of Hanawaltite =9.52 gm/cc.

Fermion Index:

Fermion Index = 0.28
Boson Index = 0.72

Photoelectric:

PE_Hanawaltite=1,618.69 barns/electron
U=PE_Hanawaltite x rElectron Density=12500.51 barns/cc.

Radioactivity:

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

Hanawaltite Classification

Dana Class:

10.05.13.01 (10)Oxyhalides and Hydroxyhalides

(10.05)where Am (O,OH)p Xq

(10.05.13)Dana Group

10.05.13.01 Hanawaltite Hg6Hg[Cl,(OH)]2O3 Pbma 2/m 2/m 2/m

Strunz Class:

03.DD.15 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DD -With Hg

03.DD.15 Hanawaltite Hg6Hg[Cl,(OH)]2O3 Pbma 2/m 2/m 2/m

Other Hanawaltite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1282,1996) OPTIC PROP.(AntBidBlaNic3)

See Also:

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

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

Hanawaltite

Hg+6Hg++[Cl,(OH)]2O3
Dana No: 10.05.13.01 Strunz No: 03.DD.15
Locality:

Notes: