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Philippe Roth (2)'s Photo Gallery

NKC-K8XBayldonite PbCu3(AsO4)2(OH)2 , Malachite Cu2(CO3)(OH)2

08903680015838762433219.jpg
Tieftobel, Schmitten, Landwasser Valley, Albula Valley, Albula Region, Grisons, Switzerland

Field of View: .6 mm

Lath-like, macroscopically green crystals with a touch of turquoise, together with a radial spray of malachite. The at% ratios nicely match the balydonite formula.
EDXS analyses, photo and collection: Philippe Roth
Copyright: © Philippe Roth      Photo ID: 1035260     Uploaded by: Philippe Roth (2)   View Count: 14   Approval status: Public galleries    Type: Photo - 1280 x 954 pixels (1.2 Mpix)

CCK-E28Argentotennantite-(Zn) Ag6(Cu4Zn2)As4S12S

07191050015835152485061.jpg
Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Field of View: 1 mm

Strange 'window fahlore' with a (macroscopically) silvery grey color, slightly different from the steel-grey color of tennantite-(Zn). Found by the FGL in the dolomite 'ribbon 1'. EDXS analyses show 13.8 at% Ag and only a slight dominance of As over Sb.
EDXS analyses, photo and collection: Philippe Roth
Copyright: © Philippe Roth      Photo ID: 1034520     Uploaded by: Philippe Roth (2)   View Count: 32   Approval status: Public galleries    Type: Photo - 1275 x 953 pixels (1.2 Mpix)

HAM-YQGBetekhtinite (Cu,Fe)21Pb2S15 , Bornite Cu5FeS4

Multiple photos available
00366550015829923371481.jpg
Emmertsberg quarry, Waschenbach, Mühltal, Darmstadt-Dieburg, Darmstadt, Hesse, Germany

Field of View: .75 mm

Prismatic betekhtinite superficially altered to bornite. Galena and chalcocite are also present as minor components in the grains analyzed by WDS, see child photo.
WDS analysis: Dan Topa. EDXS analysis, photo and collection: Philippe Roth
Copyright: © Philippe Roth      Photo ID: 1033714     Uploaded by: Philippe Roth (2)   View Count: 25   Approval status: Public galleries    Type: Photo - 1275 x 954 pixels (1.2 Mpix)

RG1-P3RAktashite Cu6Hg3As4S12 , Realgar As4S4

03342050015770424549913.jpg
Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Field of View: 0.15 mm

Pseudocubic aktashite crystal(s) surrounded by realgar (e.g. lower right). A small amount of Zn replaces Hg (the Zn analogon of aktashite is nowackiite). The bright, tiny spots on both aktashite and realgar show a composition with the elements Hg>Te>S>As>Cu(>Ag), probably a new mineral, yet too small to be characterized.
EDXS analysis (EDXPR_3140) and photo: Philippe Roth; collection: Jürgen Daubner.
Copyright: © Philippe Roth      Photo ID: 1019857     Uploaded by: Philippe Roth (2)   View Count: 51   Approval status: Public galleries    Type: Photo - 1279 x 956 pixels (1.2 Mpix)

NTN-HHUPicotpaulite TlFe2S3

04822210015767856229987.jpg
Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland

Field of View: 0.2 mm

This strange, because unusual, half-spherical cavity in dolomite is lined with aggregates of tiny tabular picotpaulite crystals. From dolomite ribbon #1 in the central part of the quarry.
EDXS analysis, photo and collection: Philippe Roth
Copyright: © Philippe Roth      Photo ID: 1019340     Uploaded by: Philippe Roth (2)   View Count: 41   Approval status: Public galleries    Type: Photo - 1280 x 960 pixels (1.2 Mpix)

H0D-63LArseniopleite (Ca,Na)NaMn2+(Mn2+,Mg,Fe2+)2(AsO4)3 , Kemmlitzite SrAl3(AsO4)(SO4)(OH)6

07588630015766662191250.jpg
Falotta, Tinizong, Oberhalbstein Alps, Albula Valley, Albula Region, Grisons, Switzerland

Field of View: 1.0 mm

Arseniopleite crystals are exceedingly rare, worldwide but also in Falotta. These crystals were brought out after dissolving calcite from a very thin fissure. A broader fracture on the same specimen hosts excellent grischunite crystals.
XRD analysis: Nicolas Meisser, collection: Philippe Roth, photo: Matthias Reinhardt
Copyright: © Matthias Reinhardt      Photo ID: 1019136     Uploaded by: Philippe Roth (2)   View Count: 74   Approval status: Public galleries    Type: Photo - 3368 x 2472 pixels (8.3 Mpix)

RMA-HTDArseniosiderite Ca2Fe3+3(AsO4)3O2·3H2O , Tripuhyite Fe3+Sb5+O4

04437690015766647952189.jpg
Falotta, Tinizong, Oberhalbstein Alps, Albula Valley, Albula Region, Grisons, Switzerland

Field of View: 0.9 mm

Pseudo-hexagonal, partly skeletal crystals of arseniosiderite impaling acicular tripuhyite needles. The fragile assemblage - that also contains cabalzarite, grischunite and kemmlitzite (not in the photo) - was unveiled after dissolving with diluted acid the massive brandtite that completely filled the thin (3-4 mm) fissure in the radiolarite host rock.
EDXS analysis and collection: Philippe Roth, photo: Matthias Reinhardt
Copyright: © Matthias Reinhardt      Photo ID: 1019132     Uploaded by: Philippe Roth (2)   View Count: 266   Approval status: Public galleries    Type: Photo - 2976 x 2288 pixels (6.8 Mpix)

DXW-G2KAvicennite Tl2O3

Multiple photos available
02253510015739338323547.jpg
Erzmatt, Buus, Basel-Landschaft, Switzerland

Field of View: 80 μm

Tiny, macroscopically black and shiny avicennite crystals. The 'larger' ones show a combination of dominant cube {100}, octahedron {111} and rhombic dodecahedron {110}.
Collection: F. Vanini. EDXS anaysis and photo: P. Roth
Copyright: © Philippe Roth      Photo ID: 1012973     Uploaded by: Philippe Roth (2)   View Count: 97   Approval status: Public galleries    Type: Photo - 1280 x 959 pixels (1.2 Mpix)

Rare outcrop

09454790015697475235341.jpg
Tiraun, Trun, Surselva Region, Grisons, Switzerland

The uranium mineralization at Tiraun essentially consists of boulders and debris with very little outcropping rock. This may be an exception (is it a real outcrop or part of larger, burried boulder?). The rock is a paraschist. The darker zones are made of botryoidal iron hydroxides, probably pseudomorph after pitchblende. Photo taken in September 2019.
Copyright: © Philippe Roth      Photo ID: 1002836     Uploaded by: Philippe Roth (2)   View Count: 30   Approval status: Public galleries    Type: Photo - 2448 x 3264 pixels (8.0 Mpix)

TRY-4H4Zincalstibite Zn2Al(OH)6[Sb5+(OH)6]

07709960015697033676096.jpg
Les Moulins Mine, Saint-Luc, Anniviers, Valais, Switzerland

Field of View: 0.6 mm

Micaceous, optically grass to turquoise greenish zincalstibite crystals. The mineral is Fe-rich, as reported by Ansermet (2012), and Cu-rich.
EDXS, collection and photo: Philippe Roth
Copyright: © Philippe Roth      Photo ID: 1002769     Uploaded by: Philippe Roth (2)   View Count: 36   Approval status: Public galleries    Type: Photo - 1278 x 955 pixels (1.2 Mpix)
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