Pumpellyite-(Mn++) Mineral Data + 
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- 58.2.2.1 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2·(H2O) C 2/m 2/m
- 58.2.2.2 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2·(H2O) A2/m 2/m
- 58.2.2.3 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2·(H2O) Mono
- 58.2.2.4 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
- 58.2.2.5 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- 58.2.2.6 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2·(H2O) A2/m 2/m
- 58.2.2.7 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- 58.2.2.8 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2·(H2O) A2/m 2/m
- 58.2.2.9 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- VIII/C.24-10 Macfallite Ca2(Mn,Al)3(SiO4)(Si2O7)(OH)3 P 21/m 2/m
- VIII/C.24-20 Sursassite Mn2Al3(SiO4)(Si2O7)(OH)3 P 21/m 2/m
- VIII/C.24-30 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- VIII/C.24-40 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- VIII/C.24-42 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2·(H2O) A2/m 2/m
- VIII/C.24-50 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2·(H2O) A2/m 2/m
- VIII/C.24-60 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2·(H2O) C 2/m 2/m
- VIII/C.24-61 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2·(H2O) A2/m 2/m
- VIII/C.24-70 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) A2/m 2/m
- VIII/C.24-80 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2·(H2O) Mono
- VIII/C.24-80* Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m
- VIII/C.24-90 Samfowlerite Ca14Mn3Zn2(Be,Zn)2Be6(SiO4)6(Si2O7)4(OH,F)6 P 21/c 2/m
General Pumpellyite-(Mn++) Information |
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 Chemical Formula: |
Ca2(Mn++,Mg)(Al,Mn+++,Fe)2(SiO4)(Si2O7(OH)2·(H2O) | ||
| Composition: |
Molecular Weight = 504.86 gm | ||
| Calcium 15.88 % Ca 22.22 % CaO | |||
| Magnesium 1.20 % Mg 2.00 % MgO | |||
| Manganese 16.32 % Mn 10.54 % MnO / 11.73 % Mn2O3 | |||
| Aluminum 5.34 % Al 10.10 % Al2O3 | |||
| Iron 2.77 % Fe 3.95 % Fe2O3 | |||
| Silicon 16.69 % Si 35.70 % SiO2 | |||
| Hydrogen 0.60 % H 5.35 % H2O | |||
| Oxygen 41.20 % O | |||
| ______ ______ | |||
| 100.00 % 101.58 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca2Mn2+0.75Mg0.25AlMn3+0.75Fe3+0.25(SiO4)(Si2O7)(OH)·(H2O) | ||
| Environment: |
Metamorphosed Mn-oxides in pelitic and dolomitic rocks. | ||
| IMA Status: |
Approved IMA 1981 | ||
| Locality: |
Ochiai mine, Barazawa, Kohsai-cho, Yamanashi Prefecture, Japan. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the American geologist, R. Pumpelly (1837-1923). | ||
Search for Pumpellyite-(Mn ) Images | |||
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Images:
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Pumpellyite-(Mn++) Crystallography |
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| Axial Ratios: |
a:b:c =1.4884:1:3.1953 | ||
| Cell Dimensions: |
a = 8.923, b = 5.995, c = 19.156, Z = 4; beta = 97.8° V = 1,015.24 Den(Calc)= 3.30 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.93(1), 2.725(0.9), 4.75(0.65), | ||
Physical Properties of Pumpellyite-(Mn++) |
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| Cleavage: |
[001] Good, [100] Good | ||
| Color: |
Blue green, Olive green, Brown. | ||
| Density: |
3.2 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Habit: |
Massive - Lamellar - Distinctly foliated fine-grained forms. | ||
| Habit: |
Spherical - Spherical, rounded aggregates. | ||
| Hardness: |
5.5 - Knife Blade | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Pumpellyite-(Mn++) |
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| Optical Data: |
Biaxial (+), a=1.752, b=1.795, g=1.8, bire=0.0480, 2V(Calc)=36, 2V(Meas)=40-50. | ||
Calculated Properties of Pumpellyite-(Mn++) |
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| Electron Density: |
relectron=3.26 gm/cc |
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| Fermion Index |
Fermion Index = 0.00999 Boson Index = 0.99001 |
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| Photoelectric: |
PEPumpellyite-(Mn++) = 7.71 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pumpellyite-(Mn++) is Not Radioactive |
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Pumpellyite-(Mn++) Classification |
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| Dana Class: |
58.2.2.8 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups | ||
| (58.2)with cations in [6] and higher coordination; single and double groups (n=1,2) | |||
| (58.2.2)Pumpellyite group | |||
| Strunz Class: |
VIII/C.24-50 VIII - Silicates | ||
| VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups | |||
| VIII/C.24 - Pumpellyite group | |||
Other Pumpellyite-(Mn++) Information |
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Pumpellyite-(Mn++) : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas Search for Pumpellyite-(Mn++) using: Visit our Advertisers for Pumpellyite-(Mn++) : Translate Pumpellyite-(Mn++) Mineral Data : Ask about Pumpellyite-(Mn++) here : Print or Cut-and-Paste your Pumpellyite-(Mn++) Specimen Label here :
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