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Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Königsberg Mt., Wolfstein, Rhineland-Palatinate, Germany Crust of large crystallized balls to 1.5 cm in diameter. XRD and SEM-EDX confirmed. Field of view: 5.5 x 3.5 cm. P Haas photograph and collection (no. 44-002). |
| © Peter Haas | Photo ID: 12725 View Count: 1133 |
Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany Field of view 5 mm. Specimen and photo Leon Hupperichs. |
| © Leon Hupperichs | Photo ID: 95021 View Count: 161 |
Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Sieben Brüder Mine, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany Gray aggregates of Hollandite. Picture size 5 mm. Photographer and collection Thomas Witzke. |
| © Thomas Witzke | Photo ID: 12096 View Count: 436 |
Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Esperanza Mine, Lavrion Mines, Lavrion (Laurion; Laurium), Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece Hollandite crystals on matrix Field of view mm 5x3 Enrico Bonacina photo, Fabio Brignoli collection (roccelllans) |
| © Enrico Bonacina | Photo ID: 244654 View Count: 39 |
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Kajlidongri mine, Jhabua District, Madhya Pradesh, India 1 cm long intergrowth of two hollandite crystals from the type locality. Note that the smaller from they is terminated by VERY obtuse pyramide. Specimen was collected by E.J. Beer between 1905 and 1920 on the type locality. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 120578 View Count: 261 |
Hollandite : Ba(Mn4+,Mn2+)8O16, Cryptomelane : K(Mn4+,Mn2+)8O16, Goethite : α-Fe3+O(OH) | |
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Cloghleagh mine (Cloghlea mine), Kilbride, Blessington, Co. Wicklow, Ireland Shiny black botryoidal hollandite/cryptomelane, intimately intergrown, on black, mammillated and stalactitic goethite. Specimen measures 7 cm across. |
| © Dr Stephen Moreton | Photo ID: 178913 View Count: 101 |
Hollandite : Ba(Mn4+,Mn2+)8O16, Braunite : Mn2+Mn3+6[O8|SiO4] | |
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Riccò del Golfo, La Spezia Province, Liguria, Italy Black, quartz-included hollandite needles with sharp dipyramidal braunite crystals. Field size 3mm. Collection and photo R. Bracco. |
| © R. Bracco | Photo ID: 46397 View Count: 380 |
Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Riccò del Golfo, La Spezia Province, Liguria, Italy prismatic gray-metallic crystals of hollandite up to 1.9 mm Photo Enrico Bonacina, Collection Domenico Preite |
| © D. Preite | Photo ID: 170737 View Count: 122 |
Hollandite : Ba(Mn4+,Mn2+)8O16 | |
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Mount Corchia, Stazzema, Apuan Alps, Lucca Province, Tuscany, Italy Hollandite rounded crystal around 0,5 mm - s.c. July 1981 |
| © Marco Barsanti | Photo ID: 9373 View Count: 528 |
Hollandite : Ba(Mn4+,Mn2+)8O16, Quartz : SiO2 | |
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Vagli di Sotto, Apuan Alps, Lucca Province, Tuscany, Italy Specimen size around 3,5x2x3 cm - Ex Gruppo Min. Pal. Fornaci |
| © Marco Barsanti | Photo ID: 11546 View Count: 468 |
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