Controlled Substance Utilization Review and Evaluation System. CURES 2.0 (Controlled Substance Utilization Review and Evaluation System) is a database of Schedule II, III and IV controlled substance prescriptions dispensed in California serving the public health, regulatory oversight agencies, and law enforcement.
Zircon (/ËzÉrkÉn/ or /ËzÉrkÉn/ ; including hyacinth or yellow zircon) is a mineral belonging to the group of nesosilicates. Its chemical name is zirconium silicate and its corresponding chemical formula is Zr SiO4.ircon is ubiquitous in the crust of Earth. It occurs as a common accessory mineral in igneous rocks (as primary crystallization products), in metamorphic rocks and as detrital grains in sedimentary rocks. Large zircon crystals are rare.
Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun Ø²Ø±Ú¯ÙÙ, meaning gold-colored.It is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium.aturally occurring zirconium is composed of five isotopes. 90 Zr, 91 Zr, 92 Zr and 94 Zr are stable. 94 Zr can undergo double beta decay (not observed experimentally) with a half-life of more than 1.10Ã10 17 years. 96 Zr has a half-life of 2.4Ã10 19 years, making it the longest-lived radioisotope of zirconium.