KAMPHAUGITE-(Y) AND TENGERITE-(Y) FROM THE AMAZONITIC RANDPEGMATITES OF KOLA PENINSULA

摘要

The new yttrium-calcium carbonate has been found in 1984 in the later fissures intersecting the zones of small-lamellar albite within amazonitic randpegmatites of Kola Peninsula, (North-Western Russia). This mineral - kamphaugite-(Y) forms in these fissures aggregates of lamellar crystals associating with fluorite, kainosite and harmotome. There are all the necessary data on physical properties, crystallo-chemical parameteres and diagnostics features of kamphaugite in the paper. Its ideal formula is CaY (CO_3)_2(OH) centre dot H_2O. The mineral is compared, while analyzed, with tengerite series minerals: tengerite-(Y)-lokkalite-(Y)-kimuralte-(Y).