Urea Mineral Data

Urea Mineral Data +

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General Urea Information

Chemical Formula:

CO(NH2)2

Composition:

Molecular Weight = 60.06 gm

Hydrogen 6.71 % H

Carbon 20.00 % C

Nitrogen 46.65 % N

Oxygen 26.64 % O

______

100.00 %

Empirical Formula:

CO(NH₂)₂

IMA Status:

Approved IMA 1973

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 29364

PDF 28-2015

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Urea Crystallography

Axial Ratios:

a:c = 1:0.83262

Cell Dimensions:

a = 5.646, c = 4.701, Z = 2; V = 149.86 Den(Calc)= 1.33

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: P 42₁m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.98(1), 3.04(0.3), 3.61(0.2),

Physical Properties of Urea

Color:

Light brown, Light yellow.

Density:

1.33

Streak:

yellow white

Optical Properties of Urea

Optical Data:

Uniaxial (+), w=1.484, e=1.603, bire=0.1190.

Calculated Properties of Urea

Electron Density:

r_electron=1.42 gm/cc
note: r_Urea=1.33 gm/cc.

Fermion Index

Fermion Index = 0.46707
Boson Index = 0.53293

Photoelectric:

PE_Urea= 0.26 barns/electron
U=PE_Urea x r_electron= 0.37 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Urea is Not Radioactive

Urea Classification

Dana Class:

50.4.6.1 (50)Salts of Organic Acids

(50.4)with miscellaneous formulae

(50.4.6)Dana Group

50.4.6.1 Urea CO(NH2)2 P 42₁m 4 2m

Strunz Class:

IX/D.01-10 IX - Organic compunds

IX/D - Compounds with N, C and water

IX/D.01 - Urea - Guanine series

IX/D.01-10 Urea CO(NH2)2 P 42₁m 4 2m

IX/D.01-20 Acetamide CO(CH3)(NH2) R 3c 3m

IX/D.01-25 Tinnunculite* C10H12N6O8(?) Unk Ortho

IX/D.01-30 Kladnoite C6H4(CO)2NH P 2₁/n 2/m

IX/D.01-40 Uricite C5H4N4O3 P 2₁/a 2/m

IX/D.01-50 Guanine C5H3(NH2)N4O P 2₁/n 2/m

Other Urea Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Urea Specimen Label here :

Urea

CO(NH2)2
Dana No: 50.4.6.1 Strunz No: IX/D.01-10
Locality:

Notes: