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Arsiccioite

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About ArsiccioiteHide

Formula:
AgHg2Tl(As,Sb)2S6
Colour:
Red
Lustre:
Metallic, Sub-Metallic
Hardness:
2 - 2½
Specific Gravity:
5.989 (Calculated)
Crystal System:
Tetragonal
Name:
The name is for the type locality, Monte Arsiccio mine, Apuan Alps, Tuscany, Italy
Isostructural with:
Unique elements combination.

Structure details: (1) framework of (Hg,Ag)-centered tetrahedra (1 M1 + 2 M2); (2) channels || [001] wiht TlS6 and (As,Sb)S3 disymmetric polyhedra.

Derived from routhierite according to the substitution M1Cu+ + M2Hg2+M1Hg2+ + M2Ag+. This substitution obeys a steric constraint, with Ag+, the largest cation, entering the largest site, M2.


Classification of ArsiccioiteHide

Approved
Approval Year:
2013

Physical Properties of ArsiccioiteHide

Metallic, Sub-Metallic
Colour:
Red
Streak:
orange
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN50=124 kg/mm2 - Vickers
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
5.989 g/cm3 (Calculated)

Optical Data of ArsiccioiteHide

Type:
Anisotropic
Anisotropism:
weak grey to bluish rotation tints
Reflectivity:
471.1 nmR1=29.0%R2= 29.4%
548.3nmR1=27.6%R2= 28.3%
586.6 nmR1=26.1%R2= 26.5%
652.3nmR1=24.2%R2= 24.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 29.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
yellowish-white in colour
Internal Reflections:
weak and deep red in colour
Pleochroism:
Non-pleochroic

Chemical Properties of ArsiccioiteHide

Formula:
AgHg2Tl(As,Sb)2S6
IMA Formula:
AgHg2TlAs2S6

Crystallography of ArsiccioiteHide

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2m
Setting:
I4 2m
Cell Parameters:
a = 10.1386(6) Å, c = 11.3441(5) Å
Ratio:
a:c = 1 : 1.119
Unit Cell V:
1166.1 ų
Z:
4
Morphology:
Anhedral grains

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.04(28)
4.195(98)
3.542(42)
3.025(100)
2.730(17)
2.636(26)
2.518(35)
2.055(14)
Comments:
From Type Description.

Type Occurrence of ArsiccioiteHide

General Appearance of Type Material:
As anhedral grains scattered in microcrystalline baryte
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo di Storia Naturale, Universita` di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19659, and the Museo di Storia Naturale, Universita` degli Studi di Firenze, Florence, Italy, catalogue
Geological Setting of Type Material:
Baryte-pyrite-iron oxide ore deposit
Associated Minerals at Type Locality:

Synonyms of ArsiccioiteHide

Relationship of Arsiccioite to other SpeciesHide

Other Members of this group:
FerrostalderiteCuFe2TlAs2S6Tet. 4 2m : I4 2m
RalphcannoniteAgZn2TlAs2S6Tet. 4 2m : I4 2m
RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
StalderiteTl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6Tet.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aktashite3 photos of Arsiccioite associated with Aktashite on mindat.org.
Protochabournéite1 photo of Arsiccioite associated with Protochabournéite on mindat.org.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ArsiccioiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D’Orazio, M. and Vezzoni, S. (2013) Arsiccioite, IMA 2013-058. CNMNC Newsletter No. 17, October 2013, page 3003; Mineralogical Magazine, 77, 2997-3005.
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D’Orazio, M., Vezzoni, S. (2014): Mercury-arsenic sulfosalts from the Apuan Alps (Tuscany, Italy). II. Arsiccioite, AgHg2TlAs2S6, a new mineral from the Monte Arsiccio mine: occurrence, crystal structure and crystal chemistry of the routhierite isotypic series. Mineralogical Magazine, 78, 101-117.

Internet Links for ArsiccioiteHide

Localities for ArsiccioiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Sant'Anna di Stazzema
Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D’Orazio, M. and Vezzoni, S. (2013) Arsiccioite, IMA 2013-058. CNMNC Newsletter No. 17, October 2013, page 3003; Mineralogical Magazine, 77, 2997-3005; Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P., Bindi, L., D’Orazio, M., Vezzoni, S. (2014): Mercury-arsenic sulfosalts from the Apuan Alps (Tuscany, Italy). II. Arsiccioite, AgHg2TlAs2S6, a new mineral from the Monte Arsiccio mine: occurrence, crystal structure and crystal chemistry of the routhierite isotypic series. Mineralogical Magazine, 78, 101-117.
Mineral and/or Locality  
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