General Psilomelane Information![]() (Ba,H2O)2Mn5O10 |
![]() Molecular Weight = 590.03 gm |
|
Barium 23.27 % Ba 25.99 % BaO |
|
Manganese 46.56 % Mn 66.89 % Mn2O3 |
|
Hydrogen 0.34 % H 3.05 % H2O |
|
Oxygen 29.83 % O |
|
______ ______ |
|
100.00 % 95.93 % = TOTAL OXIDE |
![]() Ba•(H2O)Mn3+5O10 |
![]() General term for hard, black Mn oxides. Romanechite is one of the most common species. |
![]() Discredited IMA 1982 |
![]() Common world wide. Link to MinDat.org Location Data. |
![]() Named in 1758 from the Greek psilos - "smooth" and melas - "black." |
![]() Psilomelane + Pronunciation |
![]() | | Psilomelane Image
|
![]()
|
Psilomelane Crystallography![]() a:b:c =3.3194:1:4.809 |
![]() a = 9.56, b = 2.88, c = 13.85, Z = 2; beta = 92.5° V = 380.97 Den(Calc)= 5.14 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m |
| Physical Properties of Psilomelane![]() None |
![]() Iron black, Dark steel gray. |
![]() 4.4 - 4.7, Average = 4.55 |
![]() Opaque |
![]() Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
![]() Botryoidal - "Grape-like" rounded forms (e.g.. malachite). |
![]() Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite). |
![]() Reniform - "Kidney like" in shape (e.g.. hematite). |
![]() 5-6 - Between Apatite and Orthoclase |
![]() Non-fluorescent. |
![]() Sub Metallic |
![]() Nonmagnetic |
![]() brownish black |
| Optical Properties of Psilomelane![]() NCalc= 2.26 - from Gladstone-Dale relationship (KC = 0.245) where Ncalc=Dcalc*KC+1 |
NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.245) where Ncalc=Dmeas*KC+1 | Calculated Properties of Psilomelane![]() Bulk Density (Electron Density)=4.72 gm/cc |
note: Specific Gravity of Psilomelane =5.14 gm/cc. ![]() Fermion Index = 0.04 |
Boson Index = 0.96 ![]() PEPsilomelane = 114.11 barns/electron |
U=PEPsilomelane x rElectron Density= 538.80 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Psilomelane is Not Radioactive | Psilomelane Classification![]() 07.09.02.00 (07)Multiple Oxides |
|
(07.09)Dana Type |
|
(07.09.02)Dana Group |
|
|
![]() 04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
|
04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri |
|
04.XX -Oxide |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other Psilomelane Information![]() NAME( Duda&Rejl90) PHYS. PROP.(Mason68) |
![]() Links to other databases for Psilomelane : |
1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - Franklin Minerals(Palache) 5 - GeoScienceWorld 6 - Glendale Community College 7 - Google Images 8 - Google Scholar 9 - MinDAT 10 - Mineralienatlas (Deutsch) 11 - Online Mineral Museum 12 - QUT Mineral Atlas 13 - Ruff.Info 14 - WWW-MINCRYST Search for Psilomelane using: Visit our Advertisers for Psilomelane : A Bijoux Google Search for PsilomelaneAdam's Minerals Google Search for Psilomelane Cape Minerals Google Search for Psilomelane Dakota Matrix Minerals Google Search for Psilomelane Excalibur Mineral Corp. Google Search for Psilomelane Exceptional Minerals Google Search for Psilomelane John Betts Fine Minerals Search for Psilomelane McDougall Minerals Google Search for Psilomelane Mineral News Website Link Rock and Mineral Shows Google Search for Psilomelane Weinrich Minerals, Inc. Google Search for Psilomelane Ask about Psilomelane here : Print or Cut-and-Paste your Psilomelane Specimen Label here :
| |
|
| |