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Ardealite Mineral Data

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General Ardealite Information

Help on Chemical  Formula: Chemical Formula: Ca2(SO4)(HPO4)•4(H2O)
Help on Composition: Composition: Molecular Weight = 344.26 gm
   Calcium     23.28 %  Ca   32.58 % CaO
   Phosphorus   9.00 %  P    20.62 % P2O5
   Hydrogen     2.64 %  H    23.55 % H2O
   Sulfur       9.31 %  S    23.26 % SO3
   Oxygen      55.77 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2(SO4)(HPO4)•4(H2O)
Help on Environment: Environment: In limestone caves, as an early stage of the breakdown of bat guano, in reaction with calcite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1932
Help on Locality: Locality: From the Cioclovina Cave, Transylvania, Romania. In Italy, in the La Guangola Cave, near Altamura, Apulia. At the Magurata and Bacho Kuo Caves, Bulgaria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From "Ardeal," the old Romanian name for Transylvania.
Help on Name Pronunciation: Name Pronunciation: Ardealite + Pronunciation Say ARDEALITE
Help on Synonym: Synonym: ICSD 100626
  PDF 41-585

Ardealite Image

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Comments: Ardealite powder.
Location: Moorba Cave, Jurien Bay, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ardealite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.1848:1:0.2024
Help on Cell Dimensions: Cell Dimensions: a = 5.721, b = 30.95, c = 6.265, Z = 4; beta = 117.26° V = 986.11 Den(Calc)= 2.32
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.74(1), 3.93(0.5), 3.34(0.45),

Physical Properties of Ardealite

Help on Color: Color: Light yellow, Brown.
Help on Density: Density: 2.3
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Ardealite

Help on Optical Data: Optical Data: NCalc= 1.53 - from Gladstone-Dale relationship (KC = 0.2274) where Ncalc=Dcalc*KC+1
NCalc= 1.52 - from Gladstone-Dale relationship (KC = 0.2274) where Ncalc=Dmeas*KC+1

Calculated Properties of Ardealite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Ardealite =2.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012845606
Boson Index = 0.9987154394
Help on Photoelectric: Photoelectric: PEArdealite = 3.84 barns/electron
U=PEArdealite x rElectron Density= 9.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ardealite is Not Radioactive

Ardealite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.01)(Acid with Compound Anions.)
  (43.01.01)Dana Group Ardealite Ca2(SO4)(HPO4)•4(H2O) Cc m
Help on  Strunz Class: Strunz Class: 08.CJ.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CJ -With only large cations
08.CJ.50 Ardealite Ca2(SO4)(HPO4)•4(H2O) Cc m
08.CJ.50 Brushite CaHPO4•2(H2O) I2/a 2/m
08.CJ.50 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono
08.CJ.50 Churchite-(Nd)! Nd(PO4)•2(H2O) Mono
08.CJ.50 Churchite-(Y) YPO4•2(H2O) A2/a,Aa Mono
08.CJ.50 Pharmacolite CaHAsO4•2(H2O) Ia m

Other Ardealite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ardealite :
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: 08.CJ.50





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