A malleable metallic element, Cu; sp. gr. 8.9; hardness 2.5; cubic, but normally found massive, or as platy flakes infilling cracks or vesicles in volcanic rocks, or as a result of weathering of copper-rich mineral deposits.
科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。