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- La gagarinita-(Ce) (inicialment anomenada zajacita-(Ce)) és un mineral de la classe dels halurs. Anomenada en honor de Iuri Gagarin, el primer cosmonauta. Inicialment anomenada zajacita-(Ce) en honor del Dr. Ihor Stephan Zajac, el geòleg que va liderar l'exploració que va localitzar el mineral. Un sinònim del seu nom és el codi IMA1993-038. és l'anàleg de ceri de la gagarinita-(Y). (ca)
- Gagarinite-(Ce) previously zajacite-(Ce) is a rare radioactive fluoride mineral with formula Na(REExCa1−x)(REEyCa1−y)F6. REE refers to rare-earth elements, mostly those belonging to the lanthanide series. It crystallizes in the trigonal rhombohedral system and has a white vitreous appearance with a conchoidal fracture. It has a Mohs hardness of 3.5 and a specific gravity of 4.44 to 4.55. Zajacite is transparent with refractive indices nω = 1.483 and nε = 1.503. Gagarinite-(Y) is a yttrium-rich analog. It occurs as creamy to white anhedral to subhedral grains in pegmatite and aplite pods or lenses in a peralkaline igneous intrusion. It was discovered in 1993 at , Quebec – Labrador, (56°20'N, 64°10'W) and was initially named for , who led the expedition responsible for its discovery, and who first recognized the presence of the new mineral. The mineral was renamed gagarinite-(Ce) in 2010 by the IMA. The new name is for Russian cosmonaut Yuri Gagarin (1934–1968). (en)
- Gagarinita-(Ce) haluro motako minerala da. (eu)
- La gagarinite-(Ce) è un minerale fino al 2010 conosciuto come zajacite-(Ce). (it)
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- H-M symbol: (en)
- Rhombohedral (en)
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- Colorless, pale pink, orange (en)
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- nω = 1.483, nε = 1.503 (en)
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- a = 6.099 Å, c = 11.064 Å, Z = 3 (en)
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- La gagarinita-(Ce) (inicialment anomenada zajacita-(Ce)) és un mineral de la classe dels halurs. Anomenada en honor de Iuri Gagarin, el primer cosmonauta. Inicialment anomenada zajacita-(Ce) en honor del Dr. Ihor Stephan Zajac, el geòleg que va liderar l'exploració que va localitzar el mineral. Un sinònim del seu nom és el codi IMA1993-038. és l'anàleg de ceri de la gagarinita-(Y). (ca)
- Gagarinita-(Ce) haluro motako minerala da. (eu)
- La gagarinite-(Ce) è un minerale fino al 2010 conosciuto come zajacite-(Ce). (it)
- Gagarinite-(Ce) previously zajacite-(Ce) is a rare radioactive fluoride mineral with formula Na(REExCa1−x)(REEyCa1−y)F6. REE refers to rare-earth elements, mostly those belonging to the lanthanide series. It crystallizes in the trigonal rhombohedral system and has a white vitreous appearance with a conchoidal fracture. It has a Mohs hardness of 3.5 and a specific gravity of 4.44 to 4.55. Zajacite is transparent with refractive indices nω = 1.483 and nε = 1.503. Gagarinite-(Y) is a yttrium-rich analog. (en)
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- Gagarinita-(Ce) (ca)
- Gagarinita-(Ce) (eu)
- Gagarinite-(Ce) (en)
- Gagarinite-(Ce) (it)
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