Batu Kawi
Batu kawi[2] merujuk kepada galian berwarna merah bata berunsur hidrargirum(II) sulfida (HgS) merupakan sumber bijih paling umum untuk mendapatkan raksa.
| Batu kawi | |
|---|---|
 Batu kawi | |
| Maklumat am | |
| Kategori | Mineral sulfida |
| Formula kimia | Hidrargirum(II) sulfida, HgS |
| Pengecaman | |
| Warna | Cochineal-red, towards brownish red and lead-gray |
| Tabii hablur | Rhombohedral to tabular; granular to massive and as incrustations |
| Sistem hablur | Trigonal |
| Pengembaran | Simple contact twins, twin plane {0001} |
| Pembelahan | Prismatic {1010}, perfect |
| Fraktur | Uneven to subconchoidal |
| Kekerasan skala Mohs | 2.0-2.5 |
| Kilau | Adamantine to dull |
| Indeks biasan | nω = 2.905 nε = 3.256 |
| Sifat-sifat optik | Uniaxial (+) |
| Dwibiasan | δ = 0.351 |
| Guris | Scarlet |
| Graviti tentu | 8.176 |
| Keterlarutan | 1.04 x 10−25 g per 100 ml water (Ksp at 25 °C = 2 x 10−32)[1] |
| Diafaneiti | Transparan dalam pecahan tipis |
Jenis Batu Kawi ditentukan berdasarkan cara terbentuknya iaitu secara:
- Organik
- Mekanik
- Kimia
Ia digunakan sebagai pewarna sejak zaman kuno di Timur Dekat.
Rujukan
Bacaan tambahan
- Susan Stewart, 2014, "'Gleaming and deadly white': Toxic cosmetics in the Roman world," pp. 84f, 79-88, in History of Toxicology and Environmental Health: Toxicology in Antiquity II (Philip Wexler, Ed.), New York, NY, USA:Academic Press, ISBN 0-12-801634-5
- Barone G., Di Bella M., Mastelloni M.A., Mazzoleni P., Quartieri S., Raneri S., Sabatino G., Vailati C.,Pottery production of the pittore di lipari: chemical and mineralogical analysis of the pigments, in 2 end European Mineralogical Conference, emc2016 “Minerals, fluids and rocks: alphabet and words of planet earth”, Rimini, 11-15 sett. 2016, p. 716
- MSDS untuk sinabar Diarkibkan 2007-09-12 di Wayback Machine
- Dartmouth Toxic Metals Research Program – Mercury Diarkibkan 2009-06-26 di Wayback Machine
- Cinnabar visual reference
Templat:Ores