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Merelaniit - Manyara, Region

Sammler Zusammenfassung

Chemische Formel Mo4Pb4VSbS15
Farbe dunkelgrau
Strichfarbe dunklgrau bis schwarz
Glanz Metallglanz
Mohshärte im Moment nicht zu ermitteln
Spaltbarkeit vollkommen {001}
Bruch splitrig
Kristallsystem triklin, C1, C1
Morphologie zylindrische Barthaare zehntel von Mikrometer im Durchmesser bis 1 mm lang

Tansania/Manyara, Region

Merelaniit (9 Bilder) aus Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)

Polished axial section of a merelaniite
Aufrufe (File:
1480438054
): 288
Polished axial section of a merelaniite
Reflected light microscope images of a polished axial section of a merelaniite whisker (0.09 mm diameter) (Nikon Optiphot-Pol petrographic microscope): (a) polarizer and analyzer both aligned horizontally; (b) crossed polarizers; and (c) slightly un-crossed polarizers. (A. E. Seaman Mineral Museum collection DM 31323, reference 3666cr2). John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480438054
Wertung: 10 (Stimmen: 1)
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Polished axial section of a merelaniite

Reflected light microscope images of a polished axial section of a merelaniite whisker (0.09 mm diameter) (Nikon Optiphot-Pol petrographic microscope): (a) polarizer and analyzer both aligned horiz...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29
Polished merelaniite whisker
Aufrufe (File:
1480437974
): 257
Polished merelaniite whisker
Reflected light microscope images of longitudinal sections of a polished merelaniite whisker (0.06 mm diameter) (Nikon Optiphot-Pol petrographic microscope): (a) Polarizer and analyzer both aligned vertically, parallel to the whisker axis; (b) Polarizer and analyzer both aligned vertically, perpendicular to the whisker axis; (c,d) Analyzer aligned vertically and polarizer slightly plus/minus un-crossed. It is not certain if the core of the whisker reflects more brightly due to a possible chemical difference between the core and outer region or is simply because the layers in the core are parallel to the polished surface. (A. E. Seaman Mineral Museum collection DM 31324, reference 3666ax2). John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480437974
Wertung: 10 (Stimmen: 1)
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Polished merelaniite whisker

Reflected light microscope images of longitudinal sections of a polished merelaniite whisker (0.06 mm diameter) (Nikon Optiphot-Pol petrographic microscope): (a) Polarizer and analyzer both aligned...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29
Merelaniit
Aufrufe (File:
1480437878
): 245
Merelaniit
SEM (Hitachi S-4700) images of merelaniite (Smithsonian Institution specimen NMNH 177015, reference 3323). (a) Merelaniite cylinder partially exposed from enclosing calcite; (b) Close-up image of the surface showing visible growth-layer steps; (c,d) The same merelaniite whisker after being broken, showing the curved lamellar (scroll) structure. John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480437878
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Merelaniit

SEM (Hitachi S-4700) images of merelaniite (Smithsonian Institution specimen NMNH 177015, reference 3323). (a) Merelaniite cylinder partially exposed from enclosing calcite; (b) Close-up image of t...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29
Merelaniit
Aufrufe (File:
1480437807
): 286
Merelaniit
Scanning electron microscope (SEM) images of samples taken from the holotype specimen. (a) Cluster of merelaniite whiskers with one notably larger cylinder, associated with graphite. (Sample 3666i-190i.); (b) Section of a merelaniite-graphite cluster showing well-formed graphite crystals (Sample 3666i-190h.); (c,d) Merelaniite whiskers showing partially un-wound layers. (Sample 3666-196a.); (e,f) Individual whiskers showing conical ends and undulating diameters (Samples 3666i 190d and 3666 196c). Images taken using a Hitachi S-4700 field-emission SEM (Hitachi, Tokyo, Japan). John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480437807
Wertung: 10 (Stimmen: 1)
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Merelaniit

Scanning electron microscope (SEM) images of samples taken from the holotype specimen. (a) Cluster of merelaniite whiskers with one notably larger cylinder, associated with graphite. (Sample 3666i-...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29
Merelaniite whiskers
Aufrufe (File:
1480437673
): 635
Merelaniite whiskers
Scanning electron microscope (SEM) images of samples taken from the holotype specimen. (a) Cluster of merelaniite whiskers with one notably larger cylinder, associated with graphite. (Sample 3666i-190i.); (b) Section of a merelaniite-graphite cluster showing well-formed graphite crystals (Sample 3666i-190h.); (c,d) Merelaniite whiskers showing partially un-wound layers. (Sample 3666-196a.); (e,f) Individual whiskers showing conical ends and undulating diameters (Samples 3666i 190d and 3666 196c). Images taken using a Hitachi S-4700 field-emission SEM (Hitachi, Tokyo, Japan). John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480437673
Wertung: 9.5 (Stimmen: 2)
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Merelaniite whiskers

Scanning electron microscope (SEM) images of samples taken from the holotype specimen. (a) Cluster of merelaniite whiskers with one notably larger cylinder, associated with graphite. (Sample 3666i-...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29
Quartz crystal with inclusions of merelaniite
Aufrufe (File:
1480437563
): 432
Quartz crystal with inclusions of merelaniite
Optical photographs of (a) 2.8-cm-tall quartz crystal with inclusions of merelaniite whiskers, also associated with chabazite crystals; (b) close-up of (a) showing merelaniite, graphite and an unidentified fan-shaped phase at the left of the image (~8 mm wide field-of-view). (A. E. Seaman Mineral Museum collection DM 31315; ex. Simon Harrison collection.). John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt
Copyright: John A. Jaszczak; Beitrag: Stefan
Fundort: Tansania/Manyara, Region/Simanjiro, Distrikt/Merelani (Mererani)
Mineral: Merelaniit
Bild: 1480437563
Wertung: 10 (Stimmen: 1)
Lizenz: Creative Commons - Namensnennung (CC-BY) V.3.0
Quartz crystal with inclusions of merelaniite

Optical photographs of (a) 2.8-cm-tall quartz crystal with inclusions of merelaniite whiskers, also associated with chabazite crystals; (b) close-up of (a) showing merelaniite, graphite and an unid...

Copyright: John A. Jaszczak
Beitrag: Stefan 2016-11-29