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

1. Myers, R.J. (1986). "The new low value for the second dissociation constant of H₂S. Its history, its best value, and its impact on teaching sulfide equilibria". J. Chem. Ed. 63: 689, 687–690.
2. Wilkinson, Richard James (1932). "kawi". A Malay-English dictionary (romanised). I. Mytilini, Yunani: Salavopoulos & Kinderlis. m/s. 519 – melalui TROVE, Perpustakaan Negara Australia.

Wikimedia Commons mempunyai media berkaitan Batu Kawi

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