Richardsollyite
A valid IMA mineral species
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About Richardsollyite
R.H. Solly
Formula:
TlPbAsS3
Colour:
Grey-black
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
6.392 (Calculated)
Crystal System:
Monoclinic
Name:
The name honors Richard Harrison Solly (4 September 1851, London, England - 5 December 1925, Bournemouth, England), a British autodidact, who carefully described eight new mineral species from Lengenbach between 1901 and 1912. He can be considered the most successful scientist of the first flourishing period of Lengenbach investigations, at the dawn of the twentieth century.
Type Locality:
New structure type. Chemically similar to edenharterite, enneasartorite, hendekasartorite, hutchinsonite, and incomsartorite.
The Pb analogue of christite.
The structure has [Pb(AsS3)] layers located as per the (100) planes; the layers sandwich Tl+ cations.
Isostructural with synthetic ABCX3 compounds (A = K, Rb, Cs; B = Eu, Ba; C = As, Sb; X = S, Se).
The Pb analogue of christite.
The structure has [Pb(AsS3)] layers located as per the (100) planes; the layers sandwich Tl+ cations.
Isostructural with synthetic ABCX3 compounds (A = K, Rb, Cs; B = Eu, Ba; C = As, Sb; X = S, Se).
Unique Identifiers
Mindat ID:
47993
Long-form identifier:
mindat:1:1:47993:2
GUID
(UUID V4):
(UUID V4):
89f2b721-f42d-4a19-a5e9-0a563a3e3678
IMA Classification of Richardsollyite
Approved
Approval year:
2016
First published:
2017
Type description reference:
Classification of Richardsollyite
2.HD.15
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Rsy | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Richardsollyite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Richardsollyite
Metallic
Colour:
Grey-black
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=170 - 203 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
6.392 g/cm3 (Calculated)
Comment:
Could not be measured due to lack of material. Calculated 6.392 (empirical formula) and 6.365 (ideal formula).
Optical Data of Richardsollyite
Anisotropism:
Distinct, greyish-white to bluish rotation tints.
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 471.1nm | 27.9% | 29.8% |
| 548.3nm | 27.8% | 31.0% |
| 586.6nm | 27.3% | 30.8% |
| 652.3nm | 27.0% | 30.5% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 31.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey
Internal Reflections:
Bright-red
Chemistry of Richardsollyite
Mindat Formula:
TlPbAsS3
Elements listed:
Crystallography of Richardsollyite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.8925(2) Å, b = 8.4154(2) Å, c = 8.5754(2) Å
β = 108.665(3)°
β = 108.665(3)°
Ratio:
a:b:c = 1.057 : 1 : 1.019
Unit Cell V:
607.98 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.23 Å | (80) |
| 3.875 Å | (70) |
| 3.762 Å | (100) |
| 3.278 Å | (70) |
| 2.931 Å | (70) |
| 2.714 Å | (70) |
| 2.622 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Richardsollyite
General Appearance of Type Material:
Crystals up to 750 μm in diameter.
Place of Conservation of Type Material:
Mineralogical collections of the Musée Cantonal de Géologie, UNIL-Anthropole, Dorigny, CH-1015 Lausanne, Switzerland (catalogue number MGL n. 080126).
Geological Setting of Type Material:
Triassic metadolostone.
Associated Minerals at Type Locality:
Reference:
Meisser, N., Roth, P., Nestola, F., Biagioni, C., Bindi, L., & Robyr, M. (2017). Richardsollyite, TlPbAsS3, a new sulfosalt from the Lengenbach quarry, Binn Valley, Switzerland. European Journal of Mineralogy, 29(4), 679-688.
Synonyms of Richardsollyite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Richardsollyite associated with Hutchinsonite | TlPbAs5S9 |
Related Minerals - Strunz-mindat Grouping
| 2.HD. | Boscardinite | TlPb4(Sb7As2)S18 |
| 2.HD. | Enneasartorite | Tl6Pb32As70S140 |
| 2.HD. | Gungerite | TlAs5Sb4S13 |
| 2.HD. | Shimenite | Tl5Sb21-yAsyS34 |
| 2.HD. | Dewitite | AgzTl10-x-zPb2xSb42-x-yAsyS68 |
| 2.HD. | Vallouiseite | Ag3Tl21.5PbSb63As41.5S170 |
| 2.HD. | Buynite | TlPb14As17S40 |
| 2.HD. | Giuşcăite | Ag2Tl4Pb4As20Sb2S40 |
| 2.HD.05e | Chabournéite | AgzTl8-x-zPb4+2xSb40-x-yAsyS68 with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6) |
| 2.HD.05 | Lorándite | TlAsS2 |
| 2.HD.05 | Weissbergite | TlSbS2 |
| 2.HD.05e | Dalnegroite | (Tl4Pb2)(As12Sb8)S34 |
| 2.HD.15 | Christite | TlHgAsS3 |
| 2.HD.20 | Jankovićite | Tl5Sb9(As,Sb)4S22 |
| 2.HD.25 | Rebulite | Tl5Sb5As8S22 |
| 2.HD.30 | Imhofite | Tl5.8As15.4S26 |
| 2.HD.35 | Edenharterite | PbTlAs3S6 |
| 2.HD.40 | Jentschite | TlPbAs2SbS6 |
| 2.HD.45 | Hutchinsonite | TlPbAs5S9 |
| 2.HD.45 | Protochabournéite | Tl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9) |
| 2.HD.50 | Bernardite | TlAs5S8 |
| 2.HD.55 | Sicherite | TlAg2(As,Sb)3S6 |
| 2.HD.55 | Geuerite | Ag2Tl4Pb4As22S40 |
| 2.HD.60 | Gabrielite | Tl6Ag3Cu6(As,Sb)9S21 |
| 2.HD.65 | Tsygankoite | Mn8Tl8Hg2(Sb21Pb2Tl)S48 |
| 2.HD.70 | Drechslerite | Tl4(Sb4-xAsx)S8 (1 < x < 2) |
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.
Internet Links for Richardsollyite
mindat.org URL:
https://www.mindat.org/min-47993.html
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References for Richardsollyite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter No. 33. Mineralogical Magazine, 80 (6) 1135-1144 doi:10.1180/minmag.2016.080.085
Localities for Richardsollyite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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.
Switzerland (TL) | |
| Meisser et al. (2016) +2 other references |
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Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland