Artsmithite Mineral Data

General Artsmithite Information

Chemical Formula:

Hg+4Al(PO4)1.74(OH)1.78

Composition:

Molecular Weight = 1,024.86 gm

Aluminum 2.63 % Al 4.97 % Al₂O₃

Mercury 78.29 % Hg 81.41 % Hg₂O

Phosphorus 5.26 % P 12.05 % P₂O₅

Hydrogen 0.18 % H 1.56 % H₂O

Oxygen 13.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Hg₄Al(PO₄)_1.74(OH)_1.78

Environment:

Secondary mineral derived from cinnabar in the Jackfork Sandstone member of the Stanley Formation (Pennsylvanian Age).

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Funderburk Prospect, Pike County, Arkansas, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Arthur (Art) E. Smith (1935-), American petroleum geologist from Houston, Texas who collected the original sample.

Synonym:

IMA2002-039

Artsmithite Image

Images:

Artsmithite

Comments: White to tan, radial, acicular crystals of artsmithite on matrix.
Location: Funderburk Prospect, Pike County, Arkansas, USA. Scale: Picture size 0.7 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Artsmithite

Comments: White or faint green platy micro crystals of artsmithite on matrix.
Location: Funderburk prospect, Pike County, Arkansas, USA. Scale: Crystal size 0.5 mm.
© Tom Loomis / Dakota Matrix

Artsmithite Crystallography

Axial Ratios:

a:b:c =1.8759:1:0.773

Cell Dimensions:

a = 17.022, b = 9.074, c = 7.015, Z = 4; beta = 101.2° V = 1,062.88 Den(Calc)= 6.40

Crystal System:

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

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

By Intensity(I/I_o): 8.326(1)(200), 2.979(0.8)(202), 2.784(0.8)(600),2.66(0.75)(330), 2.952(0.5)(402), 4.739(0.5)(210),

Physical Properties of Artsmithite

Cleavage:

None

Color:

White, Colorless.

Diaphaneity:

Transparent to Translucent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Fibrous - Crystals made up of fibers.

Luster:

Vitreous (Glassy)

Streak:

creamy white

Optical Properties of Artsmithite

Optical Data:

Biaxial (+), 2V(Meas)=60. Dispersion r < v distinct.

NCalc= 1.99 - from Gladstone-Dale relationship (KC = 0.1549) where Ncalc=Dcalc*KC+1

Calculated Properties of Artsmithite

Electron Density:

Bulk Density (Electron Density)=5.38 gm/cc
note: Specific Gravity of Artsmithite =6.40 gm/cc.

Fermion Index:

Fermion Index = 0.23
Boson Index = 0.77

Photoelectric:

PE_Artsmithite=1,318.48 barns/electron
U=PE_Artsmithite x rElectron Density=7,094.02 barns/cc.

Radioactivity:

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

Artsmithite Classification

Dana Class:

41.05.20.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.05)where (A B)2 (XO4) Zq

(41.05.20)Dana Group

41.05.20.01 Artsmithite! Hg4Al(PO4)1.74(OH)1.78 C 2/c 2/m

Strunz Class:

08.BO.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BO -With only large cations, (OH, etc.):RO4 ï¿½ 1:1

08.BO.40 Artsmithite! Hg4Al(PO4)1.74(OH)1.78 C 2/c 2/m

Other Artsmithite Information

References:

NAME( CanMin, v 41, p 723) PHYS. PROP.(CanMin, v 41, p 723) OPTIC PROP.(CanMin, v 41, p 723)

See Also:

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

Artsmithite

Hg+4Al(PO4)1.74(OH)1.78
Dana No: 41.05.20.01 Strunz No: 08.BO.40
Locality:

Notes:

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