Wallkilldellite-(Fe)

General Information:
 Chemical Formula:
(Ca,Cu)4Fe6[(As,Si)O4]4(OH)8
 Composition:
(Molecular Weight = 1,163.76 gm)
Calcium 10.33 % Ca
Iron 28.79 % Fe
Copper 5.46 % Cu
Silicon 2.41 % Si
Arsenic 19.31 % As
Hydrogen 0.69 % H 
Oxygen 33.00 % O 
 Empirical Formula:
Ca3CuFe2+6(AsO4)3(SiO4)(OH)8
 Environment:
The Fe++ dominant analog of wallkilldellite.
 IMA Status:
Proposed IMA 1998 (Dana # Added)
 Name Origin:
Commission on New Minerals and Mineral Names.
Physical Properties:
 Color:
brownish yellow.
 Diaphaniety:
Translucent
 Luster:
Vitreous - Resinous
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