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Wallkilldellite-(Fe) Mineral Data

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General Wallkilldellite-(Fe) Information

Help on Chemical  Formula: Chemical Formula: (Ca,Cu)4Fe6[(As,Si)O4]4(OH)8•18(H2O)
Help on Composition: Composition: Molecular Weight = 1,506.74 gm
   Calcium    9.58 %  Ca   13.40 % CaO
   Iron      22.24 %  Fe   28.61 % FeO
   Copper     1.69 %  Cu    2.11 % CuO
   Silicon    0.56 %  Si    1.20 % SiO2
   Arsenic   18.40 %  As   28.22 % As2O5
   Hydrogen   2.94 %  H    26.30 % H2O
   Oxygen    44.60 %  O
            ______        ______ 
            100.00 %       99.84 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3.6Cu0.4Fe2+6(AsO4)3.7(SiO4)0.3(OH)8�18(H2O)
Help on Environment: Environment: Occurs as an oxidation product in a Cu, Ag mine.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Roua mine (Alpes-Maritimes, France) Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Fe++ dominant analog of wallkilldellite.
Help on Name Pronunciation: Name Pronunciation: Wallkilldellite-(Fe) + Pronunciation Say WALLKILLDELLITE-(FE)
Help on Synonym: Synonym: IMA1997-032
 

Wallkilldellite-(Fe) Image

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  Wallkilldellite-(Fe)

Comments: Brown wallkilldellite-(Fe) with reddish cuprite.
Location: Roua Mine, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Wallkilldellite-(Fe) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.54459
Help on Cell Dimensions: Cell Dimensions: a = 6.548, c = 23.21, Z = 1; V = 861.83 Den(Calc)= 2.90
Help on Crystal System: Crystal System: Hexagonal Space Group: P 63/mmc, P 63mc, or P 62c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.6(1), 5.67(0.8), 3.275(0.7),1.64(0.25), 2.76(0.15),
 

Physical Properties of Wallkilldellite-(Fe)

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brownish yellow.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Fragile - Crystals with a delicate and easily injured structure.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light brown
 

Optical Properties of Wallkilldellite-(Fe)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.12 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.159 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2586,KPDmeas= 0.25,KC= 0.2232
Ncalc = 1.65 - 1.67
Help on Optical Data: Optical Data: Uniaxial (-), w=1.75.
 

Calculated Properties of Wallkilldellite-(Fe)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Wallkilldellite-(Fe) =3.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.00532354
Boson Index = 0.99467646
Help on Photoelectric: Photoelectric: PEWallkilldellite-(Fe) = 20.57 barns/electron
U=PEWallkilldellite-(Fe) x rElectron Density= 61.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wallkilldellite-(Fe) is Not Radioactive
 

Wallkilldellite-(Fe) Classification

Help on  Dana Class: Dana Class: 42.04.12.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.04)where (AB)5 (XO4)2 Zq � x(H2O)
  (42.04.12)Wallkilldellite Group
 
42.04.12.01 Wallkilldellite Ca4Mn6As4O16(OH)8•18(H2O) P 6/mmc 6/m 2/m 2/m
 
42.04.12.02 Wallkilldellite-(Fe)! (Ca,Cu)4Fe6[(As,Si)O4]4(OH)8•18(H2O) P 63/mmc, P 63mc, or P 62c Hex
Help on  Strunz Class: Strunz Class: 08.DL.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DL.20 Wallkilldellite Ca4Mn6As4O16(OH)8•18(H2O) P 6/mmc 6/m 2/m 2/m
 
08.DL.20 Wallkilldellite-(Fe)! (Ca,Cu)4Fe6[(As,Si)O4]4(OH)8•18(H2O) P 63/mmc, P 63mc, or P 62c Hex
 
08.DL.20 Joelbruggerite! Pb3Zn3SbAs2O13(OH) P 321 3 2
 

Other Wallkilldellite-(Fe) Information

Help on References: References: NAME( AmMin, Vol 86) PHYS. PROP.(AmMin, vol 86) OPTIC PROP.(AmMin, Vol 86)
Help on See Also: See Also: Links to other databases for Wallkilldellite-(Fe) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Wallkilldellite-(Fe) Specimen Label here :

Wallkilldellite-(Fe)

(Ca,Cu)4Fe6[(As,Si)O4]4(OH)8•18(H2O)
Dana No: 42.04.12.02 Strunz No: 08.DL.20
Locality:

 

Notes:

 

 
   
 


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