Jadarite
| Jadarite | |
|---|---|
|
Jadarite on display at the Natural History Center in Svilajnac, Serbia | |
| General | |
| Category | Nesosilicate |
| Formula (repeating unit) | LiNaSiB3O7OH |
| Strunz classification | 9.AJ.40 |
| Crystal system | Monoclinic |
| Crystal class |
Prismatic (2/m) H-M symbol: (2/m) |
| Space group | P21/n |
| Unit cell |
a = 6.816(2), b = 13.789(2) c = 6.758(2) [Å]; β = 111.08(2)°; Z = 4 |
| Identification | |
| Formula mass | 219.46 g/mol |
| Color | White |
| Crystal habit | As microscopic anhedral grains |
| Fracture | Irregular to conchoidal |
| Tenacity | Brittle |
| Mohs scale hardness | 4 - 5 |
| Luster | Dull |
| Streak | White |
| Diaphaneity | Translucent to opaque |
| Specific gravity | 2.45 |
| Optical properties | Biaxial |
| Ultraviolet fluorescence | Weak pink to orange under UV |
| References | [1][2] |
Jadarite is a white, earthy monoclinic silicate mineral,[1] whose chemical formula is: LiNaSiB3O7(OH) or Na2OLi2O(SiO2)2(B2O3)3H2O.
It was discovered in November 2006, in drill core from the Jadar Valley (Serbian Cyrillic: Јадар, Jadar) in Serbia, from which it is named. It was confirmed as a new mineral after scientists at the Natural History Museum in London and the National Research Council of Canada conducted tests on it.[3] Exploration geologists from Rio Tinto Exploration discovered the mineral as small rounded nodules in drill core, and after being unable to match it with previously known minerals enlisted the expertise of Chris Stanley, from the Natural History Museum, who later described it as being unique to mineralogy.[4]
Jadarite in fiction
Jadarite's chemical formula is very close to the formula ("sodium lithium boron silicate hydroxide with fluorine") invented for the fictional substance kryptonite in the 2006 film Superman Returns. This coincidence attracted mass-media attention, and jadarite was covered by ABC, BBC, CNN, Washington Post, and Yahoo, among others.
The new mineral, unlike the fictional material in the movie, does not contain fluorine, does not emit electromagnetic radiation, and is white rather than green (although, in the Superman comics, there is a white colored variety of kryptonite). In all other respects the chemistry matches that of the rock containing kryptonite in the movie. The jadarite fluoresces a pinkish-orange color when exposed to UV light.[5]
References
- 1 2 "Jadarite". mindat.org. 2007. Retrieved 2007-04-25.
- ↑ Webmineral data
- ↑ Whitfield, Pamela. LiNaSiB3O7(OH) a novel structure of the new borosilicate mineral jadarite determined from laboratory powder diffraction data Acta Crystallographica Section B Structural Science, International Union of Crystallography, DOI 10.1107/S0108768107010130, ISSN 0567-7408. (abstract).
- ↑ 'Kryptonite' discovered in mine. BBC News
- ↑ "Kryptonit är är inte bara påhitt" (in Swedish). Retrieved 2007-04-24.