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Arsenmarcobaldiite

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About ArsenmarcobaldiiteHide

Formula:
Pb12(As3.2Sb2.8)Σ6S21
Lustre:
Metallic
Crystal System:
Triclinic
Name:
Named for being the As-dominant isotype of marcobaldiite.
Belongs to the jordanite homologous series. Probably the As2Sb2 analogue of marcobaldiite.


Classification of ArsenmarcobaldiiteHide

Approved
Approval Year:
2016
First Published:
2019

Physical Properties of ArsenmarcobaldiiteHide

Metallic

Optical Data of ArsenmarcobaldiiteHide

Type:
Anisotropic
Anisotropism:
Distinct, brownish to bluish-grey
Reflectivity:
470nmR1=32.8%R2= 38.3%
546nmR1=32.2%R2= 37.5%
589nmR1=31.7%R2= 36.9%
650nmR1=31.4%R2= 36.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 38.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Pleochroism:
Weak
Comments:
Shades of gray

Chemical Properties of ArsenmarcobaldiiteHide

Formula:
Pb12(As3.2Sb2.8)Σ6S21
IMA Formula:
Pb12(As3.2Sb2.8)Σ6S21

Crystallography of ArsenmarcobaldiiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.9736(9) Å, b = 29.334(3) Å, c = 8.4925(10) Å
α = 98.369(6)°, β = 118.705(6)°, γ = 90.874(6)°
Ratio:
a:b:c = 0.306 : 1 : 0.29
Unit Cell V:
1930.5 ų
Z:
2
Twinning:
Polysynthetic twinning is common and characteristic

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.595Å(m)
3.556Å(m)
3.429Å(m)
3.214Å(ms)
3.027Å(ms)
2.233Å(s)
2.125Å(ms)
1.839Å(ms)

Type Occurrence of ArsenmarcobaldiiteHide

General Appearance of Type Material:
Black anhedral grains, up to 0.5 mm in size
Place of Conservation of Type Material:
Mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (Pisa), Italy (catalogue number 19898)
Associated Minerals at Type Locality:
Reference:
Biagioni, C., Moëlo, Y., Merlino, S., Pasero, M., Paar, W.H., Vezzoni, S., Zaccarini, F. (2019) Arsenmarcobaldiite, Pb12(As3.2Sb2.8)Σ=6S21, a new N = 3.5 jordanite homologue from the Sant’Anna tectonic window, Apuan Alps (Tuscany, Italy). European Journal of Mineralogy: 31(5-6): 1067–1077.

Synonyms of ArsenmarcobaldiiteHide

Relationship of Arsenmarcobaldiite to other SpeciesHide

Other Members of this group:
GeocronitePb14(Sb,As)6S23Mon. 2/m : P21/m
GratonitePb9As4S15Trig. 3m : R3m
JordanitePb14(As,Sb)6S23Mon. 2/m : P21/m
KirkiitePb10Bi3As3S19Mon. 2/m : P21/m
MarcobaldiitePb12(Sb3As2Bi)Σ6S21Tric. 1 : P1

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 ArsenmarcobaldiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Biagioni, C., Merlino, S., Moëlo, Y., Pasero, M., Paar, W.H., Vezzoni, S., Zaccarini, F. (2016) Arsenmarcobaldiite, IMA 2016-045. CNMNC Newsletter No. 33, October 2016, page 1138. Mineralogical Magazine: 80: 1135–1144.
Biagioni, C., Moëlo, Y., Merlino, S., Pasero, M., Paar, W.H., Vezzoni, S., Zaccarini, F. (2019) Arsenmarcobaldiite, Pb12(As3.2Sb2.8)Σ=6S21, a new N = 3.5 jordanite homologue from the Sant’Anna tectonic window, Apuan Alps (Tuscany, Italy). European Journal of Mineralogy: 31(5-6): 1067–1077.

Internet Links for ArsenmarcobaldiiteHide

Localities for ArsenmarcobaldiiteHide

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
      • Stazzema
        • Sant'Anna di Stazzema
Biagioni, C., Merlino, S., Moëlo, Y., Pasero, M., Paar, W.H., Vezzoni, S., Zaccarini, F. (2016): Arsenmarcobaldiite, IMA 2016-045. CNMNC Newsletter No. 33, October 2016, page 1138; Mineralogical Magazine: 80: 1135–1144
 
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