Pumpellyite-(Al) Mineral Data

Pumpellyite-(Al) Mineral Data
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General Pumpellyite-(Al) Information

Help on Chemical Formula: Chemical Formula: Ca2(Al,Fe++,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O
Help on Composition: Composition: Molecular Weight = 481.95 gm
   Sodium      0.05 %  Na    0.06 % Na2O
   Calcium    16.55 %  Ca   23.15 % CaO
   Magnesium   1.21 %  Mg    2.01 % MgO
   Manganese   0.11 %  Mn    0.15 % MnO
   Aluminum   13.55 %  Al   25.60 % Al2O3
   Iron        3.82 %  Fe    4.92 % FeO
   Silicon    17.48 %  Si   37.40 % SiO2
   Hydrogen    0.75 %  H     6.69 % H2O
   Oxygen     46.48 %  O
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.99Na0.01Al0.42Fe2+0.33Mg0.24Mn2+0.01Al2(SiO4)(Si2O7)(OH)2.42·0.58(H2O)
Help on Environment: Environment: Found in late-formed veins associated with calcite, K-feldspar, and chlorite in aggregates. Pumpellyite group.
Help on IMA Status: IMA Status: Approved IMA 2005 - (Dana # Added)
Help on Locality: Locality: Carrière de la Flèche quarry, near Bertrix, Ardennes, Belgium. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Al analog of pumpellyite.
Help on Name Pronunciation: Name Pronunciation: Pumpellyite-(Al) + Pronunciation Say PUMPELLYITE-(AL)
Help on Synonym: Synonym: IMA2005-016
 

Pumpellyite-(Al) Image

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Pumpellyite-(Al)

Comments: Pale green radiating fibrous to bladed pumpellyite-(Al) crystals on matrix.
Location: La Fleche Quarry, Bertrix, Luxembourg Province, Belgium. Scale: See Image.
© Rruff Database

Pumpellyite-(Al) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.495:1:3.2427
Help on Cell Dimensions: Cell Dimensions: a = 8.818, b = 5.898, c = 19.126, Z = 4; beta = 97.26° V = 986.74 Den(Calc)= 3.24
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.895(1), 2.912(0.95), 3.787(0.8),3.04(0.7), 4.371(0.65), 2.191(0.45), 2.731(0.4), 8.735(0.35),
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Yoshiasa A , Matsumoto T , American Mineralogist , 70 (1985) p.1011-1019, Crystal structure refinement and crystal chemistry of pumpellyite

 

Physical Properties of Pumpellyite-(Al)

Help on Cleavage: Cleavage: {001} Good, {100} Good
Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Pumpellyite-(Al)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KC= 0.2158
Ncalc = 1.7
Help on Optical Data: Optical Data: Biaxial (+), a=1.678, b=1.68, g=1.691, bire=0.0130
 

Calculated Properties of Pumpellyite-(Al)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Pumpellyite-(Al) =3.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPumpellyite-(Al) = 4.28 barns/electron
U=PEPumpellyite-(Al) x rElectron Density= 13.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pumpellyite-(Al) is Not Radioactive
 

Pumpellyite-(Al) Classification
Help on Dana Class: Dana Class: 58.02.02.11 (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-(Al) Information
Help on References: References: NAME( AmMin, v73:253) PHYS. PROP.(AmMin, v73:253) OPTIC PROP.(AmMin, v73:253)
Help on See Also: See Also: Links to other databases for Pumpellyite-(Al) :
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-(Al) Specimen Label here :

Pumpellyite-(Al)

Ca2(Al,Fe++,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O
Dana No: 58.02.02.11 Strunz No: 09.BG.20
Locality:

 

Notes: