What is an advantage of using nuclear power?

Large nameplate capacity per plant, typically around 1 GW.
Typically 90% capacity factor, maximizing output from the nameplate capacity.
Small fuel transportation volumes as the fissionable material just isn't that big or heavy compared to equivalent fossil fuel BTU sources.
Low CO2 per MWH on a full life cycle basis. ~12 grams which is only slightly more than wind / solar.
This is a reason nuclear is a much better source for one of the major pressing problems of today than fossil fuels: global warming.No particulate matter pollution.No sulfur dioxide or other chemical pollution.Low fatalities per TWH. 
Nuclear is higher than renewables according to current statistics, but much, much lower than fossil fuel generation.

Nuclear power generates lots of clean, stable energy.

Characteristic expected of mineral from lava at earth's surface

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.