| 释义 |
ˈplacodine Min.
Also placodite.
[ad. Ger. plakodin (A. Breithaupt 1841), f. Gr. πλακώδης flat, cake like, f. πλάξ, πλακ- tablet, cake.]
A name given, on the supposition of its being a native mineral, to an arsenide of nickel, Ni4As2, now considered to be a furnace-product.
1856Eng. Cycl. IV. 367/2 Placodine (Arseniuret of Nickel)... Primary form an oblique rhombic prism. 1886Cassell's Encycl. Dict., Placodine, placodite. |