Herbertsmitite is a rare mineral , chloride with the chemical formula Zn Cu 3 ( OH ) 6 Cl 2 , an antiferromagnet . It belongs to the group of the attack . Named for the mineralogist Herbert Smith (GF Herbert Smith, 1872-1953), first discovered in Chile in 1972. Secondary, formed in the near-surface conditions during hypergene processes.
| Herbertsmitit | |
|---|---|
 Sample of mineral from the province of Tocopilla ( Chile ) | |
| Formula | ZnCu 3 (OH) 6 Cl 2 |
| Physical properties | |
| Colour | Blue green |
| Color features | Light green |
| Shine | From glass to diamond |
| Transparency | Transparent |
| Hardness | 3–3.5 |
| Cleavage | clear rhombohedron {10 1 1} |
| Kink | Fragile |
| Density | 3.75-3.95 g / cm³ |
| Syngony | Trigonal, hexagonal ascaleanal class simm. |
| Refractive index | n ε = 1.817, n ω = 1.825 |
In 2007, an assumption was made about the possible demonstration by Herbertsmitite of the properties of a spin liquid . The assumption received experimental confirmation in 2012 [1] . Thus a new type of magnetism was discovered.
Notes
- ↑ MIT researchers discover a new kind of magnetism . MIT News (December 19, 2012). Archived January 25, 2013.
Links
- Alternative state of matter found in the basket
- Fractionalized excitations in the spin-liquid state of a kagome-lattice antiferromagnet (Eng.) . Nature (June 3, 2012).
- Identification of Strongly Correlated Spin Liquid in Herbertsmithite (English) . ArXiv.org (November 11, 2011).
- Amusia, M., Popov, K., Shaginyan, V., Stephanovich, V. Theory of Heavy-Fermion Compounds - Theory of Strongly Correlated Fermi-Systems . - Springer, 2014. - ISBN 978-3-319-10825-4 .