Ardealite Mineral Data + 
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- 43.1.1.1 Ardealite Ca2(SO4)(HPO4)·4(H2O) Cc m
- VI/C.22-10 Bassanite 2CaSO4·(H2O) Unk Ortho
- VI/C.22-20 Gypsum CaSO4·2(H2O) A2/a 2/m
- VI/C.22-25 Rapidcreekite Ca2(SO4)(CO3)·4(H2O) Pcnb 2/m 2/m 2/m
- VI/C.22-30 Ardealite Ca2(SO4)(HPO4)·4(H2O) Cc m
General Ardealite Information |
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 Chemical Formula: |
Ca2(SO4)(HPO4)·4(H2O) | ||
| 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 | |||
| Empirical Formula: |
Ca2(SO4)(HPO4)·4(H2O) | ||
| Environment: |
In limestone caves, as an early stage of the breakdown of bat guano, in reaction with calcite. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1932 | ||
| 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. | ||
| Name Origin: |
From "Ardeal," the old Romanian name for Transylvania. | ||
| Synonym: |
ICSD 100626 | ||
| PDF 41-585 | |||
Ardealite Image | |||
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Images:
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Ardealite Crystallography |
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| Axial Ratios: |
a:b:c =0.1848:1:0.2024 | ||
| Cell Dimensions: |
a = 5.721, b = 30.95, c = 6.265, Z = 4; beta = 117.26° V = 986.11 Den(Calc)= 2.32 | ||
| Crystal System: |
Monoclinic - DomaticH-M Symbol (m) Space Group: Cc | ||
| X Ray Diffraction: |
By Intensity(I/Io): 7.74(1), 3.93(0.5), 3.34(0.45), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Ardealite |
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| Color: |
Light yellow, Brown. | ||
| Density: |
2.3 | ||
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Hardness: |
1-1.5 - Talc or a little harder | ||
| Luster: |
Earthy (Dull) | ||
| Streak: |
white | ||
Optical Properties of Ardealite |
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| 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 |
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Calculated Properties of Ardealite |
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| Electron Density: |
relectron=2.37 gm/cc |
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| Fermion Index |
Fermion Index = 0.00128 Boson Index = 0.99872 |
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| Photoelectric: |
PEArdealite = 3.84 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ardealite is Not Radioactive |
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Ardealite Classification |
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| Dana Class: |
43.1.1.1 (43)Compound Phosphates, etc. | ||
| (43.1)(Acid with Compound Anions.) | |||
| (43.1.1)Dana Group | |||
| Strunz Class: |
VI/C.22-30 VI - Sulfates,Chromates,Molybdates and Tungstates | ||
| VI/C - Water-bearing sulfates without unfamiliar anions. Cations of very big size | |||
| VI/C.22 - Bassanite - Ardealite series | |||
Other Ardealite Information |
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| References: |
NAME( AntBidBlaNic4) PHYS. PROP.(Dana8) | ||
| See Also: |
Links to other databases for Ardealite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Ardealite using: Visit our Advertisers for Ardealite : Translate Ardealite Mineral Data : Ask about Ardealite here : Print or Cut-and-Paste your Ardealite Specimen Label here :
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