Acetamide (original) (raw)

A valid IMA mineral species

About AcetamideHide

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Name:

Named for the chemical compound it represents: Acetic acid amide. Acetamide is the common short name (trivial name) of this compound.

Naturally occurring acetamide (acetic acid amide).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:13:6

IMA Classification of AcetamideHide

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Type description reference:

Classification of AcetamideHide

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10.AA.20

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
A : Formates, Acetates, etc.

50.4.7.1

50 : ORGANIC COMPOUNDS
4 : Miscellaneous

32.11

32 : Hydrocarbons, Resins and other Organic Compounds

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of AcetamideHide

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Comment:

Grey if included with carbonaceous material

Optical Data of AcetamideHide

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RI values:

_n_ω = 1.495 _n_ε = 1.460

δ = 0.035

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of AcetamideHide

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Crystallography of AcetamideHide

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Class (H-M):

3_m_ - Ditrigonal Pyramidal

Cell Parameters:

a = 11.44 Å, c = 13.5 Å

Unit Cell V:

1,530.09 ų (Calculated from Unit Cell)

Morphology:

Crystals are prismatic, to 5 mm, with prominent {1120}; as small stalactites and in granular aggregates.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

In burning waste coal heaps, formed between 50 degrees C and 150 degrees C. Also at At Shamokin, near Burnside, Northumberland Co., Pennsylvania, USA.

Type Occurrence of AcetamideHide

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Place of Conservation of Type Material:

Mining Museum, St. Petersburg Mining Institute, St. Petersberg, Russia;
A.E.Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia

Geological Setting of Type Material:

In waste piles of a coal shaft. A seasonal mineral, appearing only in periods of dry weather.

Synonyms of AcetamideHide

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Other Language Names for AcetamideHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Notes:

Melting point: 81°C
Boiling point: 221°C (at 1.013 bar)
Acetamide is readily soluble in water (solubility: 2 g/ml at ambient temperature). Taste very bitter; volatilises on exposure to air and sunlight.
Decomposes to ammonium acetate in contact with acids or alkali.

Health Risks:

Acetamide is classified as a potentially carcinogenic substance. It also is a mild irritant.

Industrial Uses:

In the past, acetamide was used as a plasticiser and as a stabiliser. Molten acetamide was frequently used as a solvent in chemical synthesis. It also acts as a solubiliser; its mere addition renders many sparingly soluble compounds more soluble in water.

Internet Links for AcetamideHide

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References for AcetamideHide

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Reference List:

Windholz, M., Budavari, S., Blumetti, R.F., Otterbein, E.S., editors (1983) The Merck Index, 10th ed., Merck & Co., Inc., Rahway (NJ, USA).

Localities for AcetamideHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.