Global InformationScotlandite information
| Scotlandite | |
|---|---|
| General | |
| Category | Sulfite |
| Formula (repeating unit) | PbSO3 |
| IMA symbol | Sct[1] |
| Strunz classification | 4/K.01-10 |
| Crystal system | Monoclinic |
| Crystal class | 2/m - Prismatic |
| Space group | P21/m (no. 11) |
| Unit cell | a = 4.505 Å, b = 5.333 Å c = 6.405 Å; β= 106.24°; Z = 2 |
| Identification | |
| Formula mass | 287.26 |
| Color | Pale yellow, greyish-white, colorless, transparent |
| Crystal habit | Spear-shaped crystals |
| Cleavage | Perfect along {100} and good along {010} |
| Tenacity | Radiating clusters |
| Mohs scale hardness | 2 |
| Luster | Adamantine, Pearly |
| Diaphaneity | Transparent |
| Density | 6.37 g/cm3 |
| Optical properties | Biaxial positive |
| Refractive index | nα= 2.035 nβ= 2.040 nγ= 2.085 |
| Birefringence | δ = 0.050 |
| Dispersion | v >> r strong |
| Absorption spectra | Strong 900 cm−1 |
| References | [2][3][4][5] |
Scotlandite is a sulfite mineral first discovered in a mine at Leadhills in South Lanarkshire, Scotland, an area known to mineralogists and geologists for its wide range of different mineral species found in the veins that lie deep in the mine shafts. This specific mineral is found in the Susanna vein of Leadhills, where the crystals are formed as chisel-shaped or bladed.[4] Scotlandite was actually the first naturally occurring sulfite, which has the ideal chemical formula of PbSO3. The mineral has been approved by the Commission on New Minerals and Mineral Names, IMA, to be named scotlandite for Scotland.[2]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Paar, W.H., R.S.W. Braithwaite, T.T. Chen, and P. Keller (1984) A new mineral, scotlandite (PbSO3) from Leadhills, Scotland: the first naturally occurring sulphite. Mineral. Mag., 48, 283–288.
- ^ Hudson Institute of Mineralogy, 2017, Scotlandite: https://www.mindat.org/min-3597.html (accessed November 2017)
- ^ a b Borthwick, C.W., 1992, Leadhills and Wanlockhead - an excursion: http://earthwise.bgs.ac.uk/index.php/Leadhills_and_Wanlockhead_-_an_excursion (accessed November 2017)
- ^ Pertlik, F. & Zemann, J. TMPM Tschermaks Petr. Mitt. (1985) 34: 289. https://doi.org/10.1007/BF01082968 (accessed December 2017)