Arsiccioite
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About Arsiccioite
Monte Arsiccio mine dumps
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Formula:
AgHg2Tl(As,Sb)2S6
Colour:
Red
Lustre:
Metallic, Sub-Metallic
Hardness:
2 - 2½
Specific Gravity:
5.989 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
The name is for the type locality, Monte Arsiccio mine, Apuan Alps, Tuscany, Italy
Type Locality:
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.
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 Arsiccioite
Approved
Approval Year:
2013
Physical Properties of Arsiccioite
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 Arsiccioite
Type:
Anisotropic
Anisotropism:
weak grey to bluish rotation tints
Reflectivity:
| 471.1 nm | R1=29.0% | R2= 29.4% |
| 548.3nm | R1=27.6% | R2= 28.3% |
| 586.6 nm | R1=26.1% | R2= 26.5% |
| 652.3nm | R1=24.2% | R2= 24.6% |
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 Arsiccioite
Formula:
AgHg2Tl(As,Sb)2S6
IMA Formula:
AgHg2TlAs2S6
Crystallography of Arsiccioite
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.04Å | (28) |
| 4.195Å | (98) |
| 3.542Å | (42) |
| 3.025Å | (100) |
| 2.730Å | (17) |
| 2.636Å | (26) |
| 2.518Å | (35) |
| 2.055Å | (14) |
Comments:
From Type Description.
Type Occurrence of Arsiccioite
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 Arsiccioite
Relationship of Arsiccioite to other Species
Member of:
Other Members of this group:
| Ferrostalderite | CuFe2TlAs2S6 | Tet. 4 2m : I4 2m |
| Ralphcannonite | AgZn2TlAs2S6 | Tet. 4 2m : I4 2m |
| Routhierite | Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6 | Tet. 4 2m : I4 2m |
| Stalderite | Tl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6 | Tet. |
| Unnamed (Ag-Fe endmember of Routhierite Group) | AgFe2TlAs2S6 |
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Arsiccioite associated with Aktashite | Cu6Hg3As4S12 |
| 1 photo of Arsiccioite associated with Protochabournéite | Tl2Pb(Sb,As)10S17 |
Other Information
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 Arsiccioite
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 Arsiccioite
mindat.org URL:
https://www.mindat.org/min-43935.html
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Localities for Arsiccioite
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Italy (TL) | |
| 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. |
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy