Molybdophyllite Mineral Data + 
|
[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.
- 78.5.7.1 Molybdophyllite Pb9Mg9Si9O24(OH)24 P 6322 6 2 2
- VIII/C.19-10 Nasonite Pb6Ca4Si6O21Cl2 P 63/m 6/m
- VIII/C.19-20 Molybdophyllite Pb9Mg9Si9O24(OH)24 P 6322 6 2 2
General Molybdophyllite Information |
|||
 Chemical Formula: |
Pb9Mg9Si9O24(OH)24 | ||
| Composition: |
Molecular Weight = 3,128.48 gm | ||
| Magnesium 6.99 % Mg 11.59 % MgO | |||
| Silicon 8.08 % Si 17.29 % SiO2 | |||
| Hydrogen 0.77 % H 6.91 % H2O | |||
| Lead 59.61 % Pb 64.21 % PbO | |||
| Oxygen 24.55 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Pb9Mg9Si9O24(OH)24 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1901 | ||
| Locality: |
Langbanshyttan, Vermland. Sweden. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named from the Greek for "lead" and "leaf", in allusion to its composition and foliated habit. | ||
Search for Molybdophyllite Images | |||
|
Images:
|
|
||
Molybdophyllite Crystallography |
|||
| Axial Ratios: |
a:c = 1:2.92818 | ||
| Cell Dimensions: |
a = 9.371, c = 27.44, Z = 2; V = 2,086.83 Den(Calc)= 4.98 | ||
| Crystal System: |
Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6322 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 13.8(1), 4.6(0.9), 2.67(0.7), | ||
Physical Properties of Molybdophyllite |
|||
| Cleavage: |
[0001] Perfect | ||
| Color: |
Colorless, Pale green, Pale yellow. | ||
| Density: |
4.7 | ||
| Diaphaniety: |
Transparent to translucent | ||
| Habit: |
Massive - Lamellar - Distinctly foliated fine-grained forms. | ||
| Hardness: |
3-4 - Calcite-Fluorite | ||
| Luster: |
Vitreous - Pearly | ||
| Streak: |
white | ||
Optical Properties of Molybdophyllite |
|||
| Gladstone-Dale: |
CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1582,KPDmeas= 0.1677,KC= 0.168 |
||
| Optical Data: |
Uniaxial (-), e=1.761, w=1.815, bire=0.0540. | ||
Calculated Properties of Molybdophyllite |
|||
| Electron Density: |
relectron=4.15 gm/cc |
||
| Fermion Index |
Fermion Index = 0.14261 Boson Index = 0.85739 |
||
| Photoelectric: |
PEMolybdophyllite =1,037.74 barns/electron |
||
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Molybdophyllite is Not Radioactive |
||
Molybdophyllite Classification |
|||
| Dana Class: |
78.5.7.1 (78)Unclassified silicates | ||
| (78.5)possible phyllosilicates | |||
| (78.5.7)Dana Group | |||
| Strunz Class: |
VIII/C.19-20 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.19 - Nasonite - Molybdophyllite series | |||
Other Molybdophyllite Information |
|||
| References: |
NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Molybdophyllite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas Search for Molybdophyllite using: Visit our Advertisers for Molybdophyllite : Translate Molybdophyllite Mineral Data : Ask about Molybdophyllite here : Print or Cut-and-Paste your Molybdophyllite Specimen Label here :
|
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |