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Journal Article

Crystal structure, hydrogen bonding, and high-pressure behavior of the hydroxide perovskite MgSi(OH) 6 : A phase relevant to deep subduction of hydrated oceanic crust

Mark D. Welch, Jens Najorka, Bernd Wunder
Published: 01 February 2024
American Mineralogist (2024) 109 (2): 255–264.
DOI: https://doi.org/10.2138/am-2022-8889
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View PDF for article title, Crystal structure, hydrogen bonding, and high-pressure behavior of the hydroxide perovskite MgSi(OH) 6 : A phase relevant to deep subduction of hydrated oceanic crust
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Journal Article

The new mineral tomiolloite, Al 12 (Te 4+ O 3 ) 5 [(SO 3 ) 0.5 (SO 4 ) 0.5 ](OH) 24 : A unique microporous tellurite structure

Owen P. Missen, Stuart J. Mills, Michael S. Rumsey, John Spratt, Jens Najorka, Anthony R. Kampf, Brent Thorne
Published: 01 December 2022
American Mineralogist (2022) 107 (12): 2167–2175.
DOI: https://doi.org/10.2138/am-2022-8368
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View PDF for article title, The new mineral tomiolloite, Al 12 (Te 4+ O 3 ) 5 [(SO 3 ) 0.5 (SO 4 ) 0.5 ](OH) 24 : A unique microporous tellurite structure
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Journal Article

Bridgesite-(Ce), a new rare earth element sulfate, with a unique crystal structure, from Tynebottom Mine, Cumbria, United Kingdom

Mike S. Rumsey, Frank C. Hawthorne, John Spratt, Jens Najorka, Wren Montgomery
Published: 27 April 2022
Mineralogical Magazine (2022) 86 (4): 570–576.
DOI: https://doi.org/10.1180/mgm.2022.41
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View PDF for article title, Bridgesite-(Ce), a new rare earth element sulfate, with a unique crystal structure, from Tynebottom Mine, Cumbria, United Kingdom
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Journal Article

Wildcatite, CaFe 3+ Te 6+ O 5 (OH), the second new tellurate mineral from the Detroit district, Juab County, Utah

Owen P. Missen, Stuart J. Mills, Anthony R. Kampf, Mark F. Coolbaugh, Jens Najorka, Michael S. Rumsey, Joe Marty, John Spratt, Mati Raudsepp, John K. McCormack
Published: 13 September 2021
The Canadian Mineralogist (2021) 59 (4): 729–739.
DOI: https://doi.org/10.3749/canmin.2000092
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View PDF for article title, Wildcatite, CaFe 3+ Te 6+ O 5 (OH), the second new tellurate mineral from the Detroit district, Juab County, Utah
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Journal Article

The Hexagonal ↔ Orthorhombic Structural Phase Transition in Claringbullite, Cu 4 FCl(OH) 6

Mark D. Welch, Jens Najorka, Michael S. Rumsey, John Spratt
Published: 11 May 2021
The Canadian Mineralogist (2021) 59 (1): 265–285.
DOI: https://doi.org/10.3749/canmin.2000041
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View PDF for article title, The Hexagonal ↔ Orthorhombic Structural Phase Transition in Claringbullite, Cu 4 FCl(OH) 6
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Journal Article

Elucidating the natural–synthetic mismatch of Pb 2+ Te 4+ O 3 : The redefinition of fairbankite to Pb 12 2 + (Te 4+ O 3 ) 11 (SO 4 )

Owen P. Missen, Michael S. Rumsey, Stuart J. Mills, Matthias Weil, Jens Najorka, John Spratt, Uwe Kolitsch
Published: 01 February 2021
American Mineralogist (2021) 106 (2): 309–316.
DOI: https://doi.org/10.2138/am-2020-7536
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Journal Article

Grain-scale distribution of molybdenite polytypes versus rhenium contents: μXRD and EBSD data

Olga Y. Plotinskaya, Vladimir V. Shilovskikh, Jens Najorka, Elena V. Kovalchuk, Reimar Seltmann, John Spratt
Published: 30 July 2019
Mineralogical Magazine (2019) 83 (5): 639–644.
DOI: https://doi.org/10.1180/mgm.2019.49
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View PDF for article title, Grain-scale distribution of molybdenite polytypes versus rhenium contents: μXRD and EBSD data
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Journal Article

Mineral weathering and soil development in the earliest land plant ecosystems

Ria L. Mitchell, Javier Cuadros, Jeffrey G. Duckett, Silvia Pressel, Christian Mavris, Dan Sykes, Jens Najorka, Gregory D. Edgecombe, Paul Kenrick
Journal: Geology
Published: 01 December 2016
Geology (2016) 44 (12): 1007–1010.
DOI: https://doi.org/10.1130/G38449.1
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Journal Article

Skeletal Mineralogy Patterns of Antarctic Bryozoa

Malgorzata Krzeminska, Piotr Kuklinski, Jens Najorka, Anna Iglikowska
Published: 01 May 2016
The Journal of Geology (2016) 124 (3): 411–422.
DOI: https://doi.org/10.1086/685507
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Journal Article

Aragonite in olivine from Calatrava, Spain—Evidence for mantle carbonatite melts from >100 km depth

Emma R. Humphreys, Ken Bailey, Chris J. Hawkesworth, Frances Wall, Jens Najorka, Andrew H. Rankin
Journal: Geology
Published: 01 October 2010
Geology (2010) 38 (10): 911–914.
DOI: https://doi.org/10.1130/G31199.1
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View PDF for article title, Aragonite in olivine from Calatrava, Spain—Evidence for mantle carbonatite melts from >100 km depth
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Journal Article

Composition of synthetic tremolite-tschermakite solid solutions in amphibole + anorthite-and amphibole + zoisite-bearing assemblages

Jens Najorka, Matthias Gottschalk, Wilhelm Heinrich
Published: 01 April 2002
American Mineralogist (2002) 87 (4): 462–477.
DOI: https://doi.org/10.2138/am-2002-0410
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View PDF for article title, Composition of synthetic tremolite-tschermakite solid solutions in amphibole + anorthite-and amphibole + zoisite-bearing assemblages
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