Heptasartorite
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Formula:
Tl7Pb22As55S108
System:
Monoclinic
Colour:
Grey
Lustre:
Metallic
Hardness:
3 - 3½
Member of:
Sartorite homologous series.
Physical and optical properties similar to enneasartorite and hendekasartorite. Chemical analysis and/or single-crystal X-ray diffraction is needed to distinguish them.
Physical and optical properties similar to enneasartorite and hendekasartorite. Chemical analysis and/or single-crystal X-ray diffraction is needed to distinguish them.
Classification of Heptasartorite
Approved
Approval Year:
2015
First Published:
2017
Physical Properties of Heptasartorite
Metallic
Colour:
Grey
Hardness (Mohs):
3 - 3½
Chemical Properties of Heptasartorite
Formula:
Tl7Pb22As55S108
IMA Formula:
Tl7Pb22As55S108
Elements listed in formula:
Crystallography of Heptasartorite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/c
Cell Parameters:
a = 29.269(2) Å, b = 7.8768(5) Å, c = 20.128(2) Å
β = 102.065(2)°
β = 102.065(2)°
Ratio:
a:b:c = 3.716 : 1 : 2.555
Unit Cell Volume:
V 4537.8 ų
X-Ray Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.84 | (72) |
| 3.86 | (59) |
| 3.52 | (100) |
| 3.46 | (51) |
| 2.955 | (75) |
| 2.952 | (58) |
| 2.753 | (73) |
| 2.752 | (73) |
Type Occurrence of Heptasartorite
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Naturhistorisches Museum Wien, Austria, catalogue number N 9859
Geological Setting of Type Material:
Found in the late sulfide phases in the Pb–Tl–Ag–As deposit of Lengenbach, Wallis, Switzerland.
Empirical Formula:
Tl7Pb22As55S108 (based on 192 apfu, 84Me+108S, Topa et al · 2017)
Relationship of Heptasartorite to other Species
Member of:
Other Members of Group:
| Argentobaumhauerite | Ag1.5Pb22As33.5S72 |
| Argentodufrénoysite | Ag3Pb26As35S80 |
| Argentoliveingite | AgxPb40-2xAs48+xS112 |
| Barikaite | Ag3Pb10(Sb8As11)S40 |
| Baumhauerite | Pb12As16S36 |
| Bernarlottiite | Pb6(As5Sb3)S18 |
| Boscardinite | TlPb4(Sb7As2)S18 |
| Carducciite | (Ag2Sb2)Pb12(As,Sb)16S40 |
| Dufrénoysite | Pb2As2S5 |
| Écrinsite | AgTl3Pb4As11Sb9S36 |
| Enneasartorite | Tl6Pb32As70S140 |
| Guettardite | PbAsSbS4 |
| Hendekasartorite | Tl2Pb48As82S172 |
| Hyršlite | Pb8As10Sb6S32 |
| Incomsartorite | Tl6Pb144As246S516 |
| Liveingite | Pb9As13S28 |
| Parapierrotite | TlSb5S8 |
| Philrothite | TlAs3S5 |
| Pierrotite | Tl2(Sb,As)10S16 |
| Polloneite | AgPb46As26Sb23S120 |
| Rathite | Ag2Pb12-xTlx/2As18+x/2S40 |
| Sartorite | PbAs2S4 |
| Twinnite | Pb0.8Tl0.1Sb1.3As0.8S4 |
| Veenite | Pb2(Sb,As)2S5 |
Other Names for Heptasartorite
Name in Other Languages:
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 Heptasartorite
Reference List:
Topa, D., Stroeger, B., Makovicky, E., Berlepsch, P.and Stanley, C. (2015) Heptasartorite, IMA 2015-073. CNMNC Newsletter No. 28, December 2015, page 1861; Mineralogical Magazine, 79, 1859–1864.
Topa, D., Makovicky, E., Stöger, B., Stanley, C. (2017): Heptasartorite, Tl7Pb22As55S108, enneasartorite, Tl6Pb32As70S140 and hendekasartorite, Tl2Pb48As82S172, three members of the anion-omission series of ‘sartorites’ from the Lengenbach quarry at Binntal, Wallis, Switzerland. European Journal of Mineralogy online.
Topa, D., Makovicky, E., Stöger, B., Stanley, C. (2017): Heptasartorite, Tl7Pb22As55S108, enneasartorite, Tl6Pb32As70S140 and hendekasartorite, Tl2Pb48As82S172, three members of the anion-omission series of ‘sartorites’ from the Lengenbach quarry at Binntal, Wallis, Switzerland. European Journal of Mineralogy online.
Internet Links for Heptasartorite
mindat.org URL:
https://www.mindat.org/min-46890.html
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External Links:
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Localities for Heptasartorite
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Switzerland (TL) | |
| Topa, D., Stroeger, B., Makovicky, E., Berlepsch, P.and Stanley, C. (2015) Heptasartorite, IMA 2015-073. CNMNC Newsletter No. 28, December 2015, page 1861; Mineralogical Magazine, 79, 1859–1864. |
Lengenbach Quarry, Fäld, Binn Valley, Wallis, Switzerland