|
Franciscanite-III Mineral Data + |
General Franciscanite-III Information |
|||
| Mn++6V+++++2Si2(O,OH)14 | |||
| Molecular Weight = 713.69 gm | |||
| Manganese 46.19 % Mn 59.64 % MnO | |||
| Vanadium 14.28 % V 25.48 % V2O5 | |||
| Silicon 7.87 % Si 16.84 % SiO2 | |||
| Hydrogen 0.28 % H 2.52 % H2O | |||
| Oxygen 31.39 % O | |||
| ______ ______ | |||
| 100.00 % 104.48 % = TOTAL OXIDE | |||
| Mn2+6V5+2Si2O12(OH)2 | |||
| Approved IMA 1986 | |||
| Pennsylvania mine, SW side of San Antonio Valley, 4 miles ENE of Mount Halilton, Santa Clara Co. California. Link to MinDat.org Location Data. | |||
| Named after the Miocene age Franciscan Formation. | |||
Franciscanite-III Image | |||
|
|
|
||
Franciscanite-III Crystallography |
|||
| a:c = 1:0.58959 | |||
| a = 8.148, c = 4.804, Z = 1; V = 276.21 Den(Calc)= 4.29 | |||
| Trigonal - PyramidalH-M Symbol (3) Space Group: P 3 | |||
| By Intensity(I/Io): 2.331(1), 2.844(0.9), 3.105(0.9), | |||
Physical Properties of Franciscanite-III |
|||
| Red. | |||
| 4.1 | |||
| Transparent to Translucent | |||
| 4 - Fluorite | |||
| Vitreous (Glassy) | |||
Optical Properties of Franciscanite-III |
|||
| CI meas= 0.146 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.184 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2022,KPDmeas= 0.2116,KC= 0.2477 |
|||
| Uniaxial (+), w=1.859, e=1.876, bire=0.0170. | |||
Calculated Properties of Franciscanite-III |
|||
relectron=3.88 gm/cc |
|||
| Fermion Index = 0.00418 Boson Index = 0.99582 |
|||
PEFranciscanite-III = 15.10 barns/electron |
|||
| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Franciscanite-III is Not Radioactive |
|||
Franciscanite-III Classification |
|||
| 7.3.1.2 (7)Multiple Oxides | |||
| (7.3)with 2+ and higher charged cations | |||
| (7.3.1)containing Mn (Hexagonal, P3) | |||
| VIII/B.09-10* VIII - Silicates | |||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.09 - Braunite - Langbanite - Katoptrite series | |||
Other Franciscanite-III Information |
|||
| NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Franciscanite-III : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Franciscanite-III using: Visit our Advertisers for Franciscanite-III : Translate Franciscanite-III Mineral Data : Ask about Franciscanite-III here : Print or Cut-and-Paste your Franciscanite-III Specimen Label here :
|
|||