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

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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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