Mineralogy Database

Urea Mineral Data

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General Urea Information

Help on Chemical  Formula: Chemical Formula: CO(NH2)2
Help on Composition: Composition: Molecular Weight = 60.06 gm
   Hydrogen   6.71 %  H
   Carbon    20.00 %  C
   Nitrogen  46.65 %  N
   Oxygen    26.64 %  O
            100.00 % 
Help on Empirical Formula: Empirical Formula: CO(NH2)2
Help on Environment: Environment: Derived from bat guano and urine, stable only under very arid conditions.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Toppin Hill, near Lake Rason, about 320 km northeast of Kalgoorlie, and in Wilgie Mia Cave, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for urine, in which urea was first found.
Help on Name Pronunciation: Name Pronunciation: Urea Say UREA
Help on Synonym: Synonym: ICSD 29364
  PDF 28-2015

Urea Image

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Comments: SEM image of tetragonal prismatic crystals of urea.
Location: Ghar al Hibashi Harrat Nawasif/Al Buqum, Kingdom of Saudi Arabia. Scale: See Image.
© Saudi Geological Survey

Urea Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.83262
Help on Cell Dimensions: Cell Dimensions: a = 5.646, c = 4.701, Z = 2; V = 149.86 Den(Calc)= 1.33
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: P 421m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.98(1), 3.04(0.3), 3.61(0.2),

Physical Properties of Urea

Help on Color: Color: Light brown, Light yellow.
Help on Density: Density: 1.33
Help on Streak: Streak: yellow white

Optical Properties of Urea

Help on Optical Data: Optical Data: Uniaxial (+), w=1.484, e=1.603, bire=0.1190.

Calculated Properties of Urea

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.42 gm/cc
note: Specific Gravity of Urea =1.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.46
Boson Index = 0.54
Help on Photoelectric: Photoelectric: PEUrea = 0.26 barns/electron
U=PEUrea x rElectron Density= 0.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Urea is Not Radioactive

Urea Classification

Help on  Dana Class: Dana Class: (50)Salts of Organic Acids
  (50.04)with miscellaneous formulae
  (50.04.06)Dana Group Urea CO(NH2)2 P 421m 4 2m
Help on  Strunz Class: Strunz Class: 10.CA.35 10 - ORGANIC COMPOUNDS
  10.C - Miscellaneous Organic Minerals
  10.CA -Miscellaneous Organic Materials
10.CA.35 Urea CO(NH2)2 P 421m 4 2m

Other Urea Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Urea :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 10.CA.35





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