IMA 2016-043 = richardsollyite

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Marco E. Ciriotti
Messaggi: 23422
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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IMA 2016-043 = richardsollyite

Messaggio da Marco E. Ciriotti » gio 01 giu, 2017 15:07

Prossima pubblicazione.

Referenza:
▪ 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, (in press).

Abstract:
The new mineral species richardsollyite, TlPbAsS3, was discovered in the Lengenbach quarry, Imfeld, Binn Valley, Canton Valais, Switzerland, intimately associated with hutchinsonite and baryte. It occurs as grey-black crystals, up to 750 μm, with a metallic lustre. Under the reflected-light microscope, richardsollyite is grey, with bright-red internal reflections; anisotropy is distinct, with greyish-white to bluish rotation tints. Reflectance values for the four COM wavelengths are [Rmin, Rmax (%), (λ)]: 27.9, 29.8 (471.1 nm); 27.8, 31.0 (548.3 nm); 27.3, 30.8 (586.6 nm); and 27.0, 30.5 (652.3 nm). Electron microprobe analysis gave (in wt%): Tl 34.72(51), Pb 35.45(20), As 12.80(14), Sb 0.04(1), S 16.22(13), total 99.24(47). On the basis of 6 atoms per formula unit, the chemical formula is Tl1.001Pb1.008(As1.007Sb0.002)Σ1.009S2.982. The main diffraction lines [d in Å (intensity) hkl] are: 4.23 (80) 1- 0 2; 3.875 (70) 2- 1 1; 3.762 (100) 2 1 0, 1 2 0; 3.278 (70) 1 0 2; 2.931 (70) 0 2 2; 2.714 (70) 1- 1 3; and 2.622 (80) 3- 1 2. Richardsollyite is monoclinic, space group P21/c, with a = 8.8925(2), b = 8.4154(2), c = 8.5754(2)Å, β = 108.665(3)°, V = 607.98(3)Å3, Z = 4. The crystal structure was solved and refined to R1 = 0.0242 on the basis of 1590 reflections with Fo>4σ(Fo). It can be described as formed by (1 0 0)[Pb(AsS3)]- layers sandwiching Tl+ cations, and is isostructural with synthetic ABCX3 (A = K, Rb, Cs; B = Eu, Ba; C = As, Sb; X = S, Se) compounds. The new mineral is named after Richard Harrison Solly (1851–1925) for his outstanding contribution to the knowledge of the Lengenbach mineralogy during the first flourishing period of Lengenbach investigations, at the beginning of the 20th Century.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 23422
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: IMA 2016-043 = richardsollyite

Messaggio da Marco E. Ciriotti » gio 28 set, 2017 10:03

Pubblicazione effettuata.

Referenza:
▪ 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, 679-688.

Abstract:
The new mineral species richardsollyite, TlPbAsS3, was discovered in the Lengenbach quarry, Imfeld, Binn Valley, Canton Valais, Switzerland, intimately associated with hutchinsonite and baryte. It occurs as grey-black crystals, up to 750 μm, with a metallic lustre. Under the reflected-light microscope, richardsollyite is grey, with bright-red internal reflections; anisotropy is distinct, with greyish-white to bluish rotation tints. Reflectance values for the four COM wavelengths are [Rmin, Rmax (%), (λ)]: 27.9, 29.8 (471.1 nm); 27.8, 31.0 (548.3 nm); 27.3, 30.8 (586.6 nm); and 27.0, 30.5 (652.3 nm). Electron microprobe analysis gave (in wt%): Tl 34.72(51), Pb 35.45(20), As 12.80(14), Sb 0.04(1), S 16.22(13), total 99.24(47). On the basis of 6 atoms per formula unit, the chemical formula is Tl1.001Pb1.008(As1.007Sb0.002)Σ1.009S2.982. The main diffraction lines [d in Å (intensity) hkl] are: 4.23 (80) 1- 0 2; 3.875 (70) 2- 1 1; 3.762 (100) 2 1 0, 1 2 0; 3.278 (70) 1 0 2; 2.931 (70) 0 2 2; 2.714 (70) 1- 1 3; and 2.622 (80) 3- 1 2. Richardsollyite is monoclinic, space group P21/c, with a = 8.8925(2), b = 8.4154(2), c = 8.5754(2)Å, β = 108.665(3)°, V = 607.98(3)Å3, Z = 4. The crystal structure was solved and refined to R1 = 0.0242 on the basis of 1590 reflections with Fo>4σ(Fo). It can be described as formed by (1 0 0)[Pb(AsS3)]- layers sandwiching Tl+ cations, and is isostructural with synthetic ABCX3 (A = K, Rb, Cs; B = Eu, Ba; C = As, Sb; X = S, Se) compounds. The new mineral is named after Richard Harrison Solly (1851–1925) for his outstanding contribution to the knowledge of the Lengenbach mineralogy during the first flourishing period of Lengenbach investigations, at the beginning of the 20th Century.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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TOSATO FABIO
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Re: IMA 2016-043 = richardsollyite

Messaggio da TOSATO FABIO » gio 28 set, 2017 13:59

Grandi nomi tra gli autori!
Tosato Fabio
"Il vero viaggio di scoperta non consiste nel cercare nuove terre, ma nell'avere nuovi occhi." M. Proust
Noi siamo anche quello che non siamo riusciti ad essere.
Sic transit gloria mundi.

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