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Pumpellyite-(Fe++) Mineral Data

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General Pumpellyite-(Fe++) Information

Help on Chemical  Formula: Chemical Formula: Ca2Fe++(Al,Fe+++)2(SiO4)(Si2O7)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 485.24 gm
   Calcium   16.52 %  Ca   23.11 % CaO
   Aluminum  11.12 %  Al   21.01 % Al2O3
   Iron      11.51 %  Fe   14.81 % FeO
   Silicon   17.36 %  Si   37.15 % SiO2
   Hydrogen   0.62 %  H     5.57 % H2O
   Oxygen    42.86 %  O
            ______        ______ 
            100.00 %      101.65 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Fe2+Al2(SiO4)(Si2O7)(OH)•(H2O)
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Langban, near Filipstad, Varmland, Sweden (actually TL of julgoldite). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American geologist, R. Pumpelly (1837-1923).
Help on Name Pronunciation: Name Pronunciation: Pumpellyite-(Fe++) + Pronunciation Say PUMPELLYITE-(FE++)
Help on Synonym: Synonym: Ferropumpellyite
 

Pumpellyite-(Fe++) Image

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  Pumpellyite-(Fe++)

Comments: Gas cavities in basalt matrix lined with sprays of 1 mm green pumpellyite-(Fe) crystals.
Location: Braen's Quarry, Haledon, Passaic Co., New Jersey, USA. Scale: 25x15x15 mm.
© John Betts - Fine Minerals

Pumpellyite-(Fe++) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4152:1:3.2338
Help on Cell Dimensions: Cell Dimensions: a = 8.49, b = 5.999, c = 19.4, Z = 4; beta = 100.4° V = 971.84 Den(Calc)= 3.32
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.91(1), 2.75(0.6), 3.79(0.6),2.22(0.4), 2.47(0.3), 2.66(0.3), 4.43(0.3), 4.76(0.3),
 

Physical Properties of Pumpellyite-(Fe++)

Help on Cleavage: Cleavage: {001} Good, {100} Good
Help on Color: Color: Blue green, Olive green, Brown.
Help on Density: Density: 3.2
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Pumpellyite-(Fe++)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2069,KPDmeas= 0.2147,KC= 0.2161
Ncalc = 1.69 - 1.72
Help on Optical Data: Optical Data: Biaxial (+), a=1.682, b=1.685, g=1.694, bire=0.0120
 

Calculated Properties of Pumpellyite-(Fe++)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.18 gm/cc
note: Specific Gravity of Pumpellyite-(Fe++) =3.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPumpellyite-(Fe++) = 6.40 barns/electron
U=PEPumpellyite-(Fe++) x rElectron Density= 20.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pumpellyite-(Fe++) is Not Radioactive
 

Pumpellyite-(Fe++) Classification

Help on  Dana Class: Dana Class: 58.02.02.05 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.02.02)Pumpellyite group
 
58.02.02.01 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m
 
58.02.02.02 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m
 
58.02.02.03 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono
 
58.02.02.04 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
58.02.02.05 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.06 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m
 
58.02.02.07 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.08 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m
 
58.02.02.09 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
58.02.02.10 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 2/m
 
58.02.02.11 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BG.20 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BG.20 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m
 
09.BG.20 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono
 
09.BG.20 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
 
09.BG.20 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m
 
09.BG.20 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m
 
09.BG.20 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 2/m
 

Other Pumpellyite-(Fe++) Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Pumpellyite-(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 Pumpellyite-(Fe++) Specimen Label here :

Pumpellyite-(Fe++)

Ca2Fe++(Al,Fe+++)2(SiO4)(Si2O7)(OH)2•(H2O)
Dana No: 58.02.02.05 Strunz No: 09.BG.20
Locality:

 

Notes:

 

 
   
 


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