Yellowish and colorless crystals of acetamide in a small piece of matrix, one of the few organic compounds found in Nature. From: Shamokin, Northumberland County, Pennsylvania, United States of America. Acetamide has only been found in two localities worldwide. — Photo: David Hospital · CC BY-SA 4.0
Acetamide
An organic compound (an amide of acetic acid) that occurs rarely as a mineral; industrially it is used as a plasticizer and solvent.
Intro adapted from Wikipedia (CC BY-SA).
Acetamide is an IMA-recognized mineral species in the organic mineral class, with the chemical formula CH₃CONH₂.
It crystallizes in the hexagonal crystal system (space group R3c).
Key properties: Mohs hardness 1–1.5; specific gravity 1.17; Vitreous to greasy luster; optically uniaxial.
IMA symbol Ace, IMA status: approved, named in 1974.
Found in burning waste coal heaps, formed between 50 ° C and 150 ° C.
It is found associated with Sal ammoniac (Chervonograd, Ukraine).
The name refers to ACETic acid and AMIDE, for ammonia in its composition.