Question-Researchers from Jawaharlal Nehru Centre for Advance Scientific Research (JNCASR), Bengaluru developed a new type of gold in the form of very small crystals, these are-
(a)Microcystallites
(b)Scutoid
(c)Goldstone
(d)None of the above.
Answer-(a)
Related facts-
- New type of gold in the form of very small crystals called ‘Microcystallites’ developed by researchers from JNCASR, bengaluru.
- These crystals are formed by decomposing a complex organic containing gold and other ions under controlled conditions.
Features of Microcystallites-
- These are about 3 micrometer in length and of a different crystal structure (deformed cubic structure –tetragonal and orthorhombic cells) than normal Gold (FCC Structure).
- These are found to be better than gold as microcystallites do not dissolves in mercury and Aqua regia (a mixture of nitric acid and hydrochloric acid), and shows the least interaction with
- These are found to be more stable than normal gold, it has very active surface.
With these properties these Microcystallites become an ideal candidate for catalytic purposes.
References-
https://www.thehindu.com/sci-tech/science/jncasr-a-new-robust-form-of-gold/article24725763.ece