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Keiviite-(Yb) : (Yb,Y)2[Si2O7], Fluorite : CaF2 | |
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Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia White sections of keiviite-(Yb) crystals in dark purple yttrofluorite-II masses. Specimen size 15x10 mm. |
| © B. Otter | Photo ID: 22624 View Count: 680 |
Keiviite-(Yb) : (Yb,Y)2[Si2O7] | |
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Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia White plates of Keiviite-(Yb) on matrix from the type locality at Mtn. Ploskaya, Keivy, Kola, Russia. Field of view: 1 cm. Specimen and photo: Knut Eldjarn. |
| © Knut Eldjarn | Photo ID: 54758 View Count: 319 |
Keiviite-(Yb) : (Yb,Y)2[Si2O7], Fluorite (Var: Yttrofluorite) : (Ca1-xYx)F2+x where 0.05< x <0.3 | |
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Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia 1.15 mm crystal of keiviite-(Yb) in yttrofluorite. Keiviite-(Yb) is one of four confirmed minerals with essential ytterbium. Specimen obtained from Sonke Stolze - thanks! |
| © Ł Kruszewski 08 | Photo ID: 183837 View Count: 104 |
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Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia Very small, 0.1 cm crystal, of white translucent keiviite-(Yb), with minor purple fluorite, overgrowing / intergrown with more opaque keiviite-(Y). S413-85 Excalibur Mineral specimen. |
| © 2009, JGW | Photo ID: 255083 View Count: 14 |
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