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Ambrinoite

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About AmbrinoiteHide

Formula:
[K,(NH4)]2(As,Sb)6(Sb,As)2S13 · H2O
Lustre:
Vitreous, Resinous
Specific Gravity:
3.305 (Calculated)
Crystal System:
Triclinic
Name:
After Pierluigi Ambrino (b. 1947), a mineral collector, specializing in Piedmont and manganese deposits, who kindly provided the specimen studied.
Compare gerstleyite and gillulyite (homeotypic). Unique combination of elements: ambrinoite is the only currently known potassium thioarsenite (and thioantimonite); this is also the only known sulphide/sulphosalt containing important amounts of ammonium.


Classification of AmbrinoiteHide

Approved
Approval Year:
2009
2.HE.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
E : With alkalies, H2O
3.8.8.2

3 : SULFOSALTS
8 : 1 < ø < 2

Physical Properties of AmbrinoiteHide

Vitreous, Resinous
Transparency:
Transparent
Streak:
Red
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
Perfect
Parting:
Not observed
Fracture:
Splintery
Density:
3.305 g/cm3 (Calculated)

Chemical Properties of AmbrinoiteHide

Formula:
[K,(NH4)]2(As,Sb)6(Sb,As)2S13 · H2O

Crystallography of AmbrinoiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.704(1) Å, b = 11.579(1) Å, c = 12.102(1) Å
α = 112.82(1)°, β = 103.44(1)°, γ = 90.40(1)°
Ratio:
a:b:c = 0.838 : 1 : 1.045
Unit Cell V:
1211.6 ų
Z:
2
Morphology:
Masses and groups of lamellae, elongated on [100] and flattened on (001).

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.78 Å(100)
5.79 Å(55)
5.39 Å(32)
5.31 Å(34)
4.23 Å(35)
3.747 Å(31)
3.157 Å(30)
2.876 Å(30)

Type Occurrence of AmbrinoiteHide

Synonyms of AmbrinoiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Ambrinoite associated with OrpimentAs2S3
1 photo of Ambrinoite associated with AnhydriteCaSO4

Related Minerals - Nickel-Strunz GroupingHide

2.HE.05GerstleyiteNa2(Sb,As)8S13 · 2H2OMon. m : Bm

Related Minerals - Dana Grouping (8th Ed.)Hide

3.8.8.1GerstleyiteNa2(Sb,As)8S13 · 2H2OMon. m : Bm

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 AmbrinoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bonaccorsi, E. et al. (2010): Ambrinoite (K,NH4)2(As,Sb)8S13·H2O, the first natural (K,NH4)-hydrated sulfosalt, from Signols (Piedmont, Italy). 22th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27, CD of Abstracts, p. 494.
Biagioni, C., Bonaccorsi, E., Pasero, M., Moëlo, Y., Ciriotti, M.E., Bersani, D., Callegari, A.M., Boiocchi, M. (2011): Ambrinoite, (K,NH4)2(As,Sb)8S13·H2O, a new mineral from Upper Susa Valley, Piedmont, Italy: the first natural (K,NH4)-hydrated sulfosalt. American Mineralogist, 96, 878-887.

Internet Links for AmbrinoiteHide

Localities for AmbrinoiteHide

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)
 
  • Piedmont
    • Metropolitan City of Turin
      • Oulx
        • Signols
Biagioni, C., Bonaccorsi, E., Pasero, M., Moëlo, Y., Ciriotti, M.E., Bersani, D., Callegari, A.M., Boiocchi, M. (2011): Ambrinoite, (K,NH4)2(As,Sb)8S13•H2O, a new mineral from Upper Susa Valley, Piedmont, Italy: the first natural (K,NH4)-hydrated sulfosalt. American Mineralogist, 96, 878-887.
 
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