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Source volume: 50, issue: 6, PDF page: 77. Label: Figure 34. Thenardite in reddish, twinned crystals to 4 cm with white prismatic trona, 12 cm overall, from the Zug Lake area, Wadi Natrun. Collection of the authors; Roberto Appiani photo.
Wadi El-Natrun Depression, Egypt: a premier evaporite locality yielding trona, halite, thenardite and related salts; prized for delicate, architectural crystal…
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