Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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First Report of Domeykite and Koutekite (Copper Arsenides) in Siwalik Sandstones of Romehra, Hamirpur District, Himachal Pradesh


Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, India
2 R.K. Puram, West Block VII, New Delhi - 110 066, India
 

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Koutekite and two polymorphs (i.e., alpha and beta) of domeykite (rare copper arsenide minerals) are reported for the first time from the uraniferous Lower Siwalik sandstones of the Romehra area, Hamirpur district, Himachal Pradesh. The calculated cell size of . alpha-domeykite (Cubic) is a0 = 9.646 Å and that of betadomeykite (Hexagonal) is a0 = 7.151 Å and c0 = 7.304 Å. Koutekite (Hexagonal) has measured cell parameters of a0 = 11.58 Å and c0 = 14.55 Å. However, in koutekite of Romehra area an important interplanar spacing (d) at 2.081Å is merging with 'd' of beta dorneykite at 2.061Å and another interplanar spacing at 2.47Å exhibits comparatively higher intensity than the one published in JCPDS Data Card No.13-581. Association of domeykite with uraniferous sandstones points out that uranium mineralisation in Lower Siwaliks of the Romehra took place possibly below 90°C temperature.
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  • First Report of Domeykite and Koutekite (Copper Arsenides) in Siwalik Sandstones of Romehra, Hamirpur District, Himachal Pradesh

Abstract Views: 223  |  PDF Views: 146

Authors

Yamuna Singh
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, India
K. D. P. Singh
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, India
Jyotsna Chhabra
R.K. Puram, West Block VII, New Delhi - 110 066, India
S. Srinivasan
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, India
Y. C. Sharma
R.K. Puram, West Block VII, New Delhi - 110 066, India
R. K. Gupta
Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begumpet, Hyderabad - 500 016, India

Abstract


Koutekite and two polymorphs (i.e., alpha and beta) of domeykite (rare copper arsenide minerals) are reported for the first time from the uraniferous Lower Siwalik sandstones of the Romehra area, Hamirpur district, Himachal Pradesh. The calculated cell size of . alpha-domeykite (Cubic) is a0 = 9.646 Å and that of betadomeykite (Hexagonal) is a0 = 7.151 Å and c0 = 7.304 Å. Koutekite (Hexagonal) has measured cell parameters of a0 = 11.58 Å and c0 = 14.55 Å. However, in koutekite of Romehra area an important interplanar spacing (d) at 2.081Å is merging with 'd' of beta dorneykite at 2.061Å and another interplanar spacing at 2.47Å exhibits comparatively higher intensity than the one published in JCPDS Data Card No.13-581. Association of domeykite with uraniferous sandstones points out that uranium mineralisation in Lower Siwaliks of the Romehra took place possibly below 90°C temperature.