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Aragonite Mineral Data

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General Aragonite Information

Help on Chemical  Formula: Chemical Formula: CaCO3
Help on Composition: Composition: Molecular Weight = 100.09 gm
   Calcium  40.04 %  Ca   56.03 % CaO
   Carbon   12.00 %  C    43.97 % CO2
   Oxygen   47.96 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(CO3)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1790
Help on Locality: Locality: Aragon (Spain). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Aragonite + Pronunciation Say ARAGONITE
Help on Synonym: Synonym: ICSD 15194
  Nicolsonite (Zn)
  PDF 41-1475
  Tarnowitzite (Pb)

Aragonite Image

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Comments: Clear, crystalline aragonite prism.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Aragonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6223:1:0.7205
Help on Cell Dimensions: Cell Dimensions: a = 4.959, b = 7.968, c = 5.741, Z = 4; V = 226.85 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmcn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.396(1), 1.977(0.65), 3.273(0.52),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 0 1) ( 0 1 1) ( 0 1 0) ( 1 1 0)

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Physical Properties of Aragonite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: Colorless, White, Gray, Yellowish white, Reddish white.
Help on Density: Density: 2.93
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Fluorescent and phosphorescent, Short UV=green,yellow white, Long UV=green, yellow pink.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Aragonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2157,KPDmeas= 0.2157,KC= 0.2104
Ncalc = 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.529-1.53, b=1.68-1.682, g=1.685-1.686, bire=0.1560, 2V(Calc)=16-18, 2V(Meas)=18-19. Dispersion weak, r < v.
Help on Pleochroism (x): Pleochroism (x): no.

Calculated Properties of Aragonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Aragonite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0020908312
Boson Index = 0.9979091688
Help on Photoelectric: Photoelectric: PEAragonite = 5.06 barns/electron
U=PEAragonite x rElectron Density= 14.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aragonite is Not Radioactive

Aragonite Classification

Help on  Dana Class: Dana Class: (14)Anhydrous Carbonates
  (14.01)with Simple Formula A+ CO3
  (14.01.03)Aragonite Group (Orthorhombic: Pmcn) Aragonite CaCO3 Pmcn 2/m 2/m 2/m Witherite BaCO3 Pmcn 2/m 2/m 2/m Strontianite SrCO3 Pmcn 2/m 2/m 2/m Cerussite PbCO3 Pmcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.AB.15 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AB -Alkali-earth (and other M2+) carbonates
05.AB.15 Cerussite PbCO3 Pmcn 2/m 2/m 2/m
05.AB.15 Aragonite CaCO3 Pmcn 2/m 2/m 2/m
05.AB.15 Strontianite SrCO3 Pmcn 2/m 2/m 2/m
05.AB.15 Witherite BaCO3 Pmcn 2/m 2/m 2/m

Other Aragonite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Aragonite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Glendale Community College
12 - Google Images
13 - Google Scholar
14 - Handbook of Mineralogy (MinSocAm)
15 - Handbook of Mineralogy (UofA)
16 - HyperPhysics
17 - HyperPhysics
18 - MinDAT
19 - Mineral and Gemstone Kingdom
20 - Mineralienatlas (Deutsch)
21 - NSDL Reciprocal Net (JAVA)
22 - Online Mineral Museum
23 - Philatelic Mineralogy
24 - QUT Mineral Atlas
25 - Ruff.Info
26 - Scandinavian mineral gallery
27 - University of Colorado - Mineral Structure Data
29 - YupRocks
30 - theimage

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Dana No: Strunz No: 05.AB.15





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