Titanium-bearing Samarskite-(Y)

Where it forms, where it's found

2recorded occurrences

Source · OpenStreetMap

Physical

Hardness: 1Talc
2Gypsum
3Calcite
4Fluorite
5Apatite
6Orthoclase
7Quartz
8Topaz
9Corundum
10Diamond
Density: 5.24 g/cm³

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
41NbNiobium Niobium 2 92.906 185.812
33.52%
8OOxygen Oxygen 8 15.999 127.992
23.09%
22TiTitanium Titanium 2 47.867 95.734
17.27%
39YYttrium Yttrium 1 88.906 88.906
16.04%
26FeIron Iron 1 55.845 55.845
10.08%
Total 554.289 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
41NbNiobium	Niobium	2	92.906	185.812	33.52%
8OOxygen	Oxygen	8	15.999	127.992	23.09%
22TiTitanium	Titanium	2	47.867	95.734	17.27%
39YYttrium	Yttrium	1	88.906	88.906	16.04%
26FeIron	Iron	1	55.845	55.845	10.08%
	Total	554.289	100.00%

Synonyms

Chlopinite
Hlopinite
Khlopinite
Titanian Samarskite-(Y)

Literature, links & citation

Citations

1932Starik, I.E and Segal', N.M. (1932): Trudy tsentral'noi chimisheskoi laboratorii TsNIGRIza 1931 god, 43 (in Russian).
1933Starik, I.E. (1933): Problemy Sovetskoi Geologii, 3, N7, 70 (in Russian).
1934Schubnikova and Yuferov (1934), Report on New Minerals, Leningrad: 104.
1938Iovchev, E.S., Kul'tiasov, S.V. and Pyatnov, V.I. (1938): "Khlopinites in Zaganskii range pegmatites", Mineral'noe syr'ye, N9, 6-15 (in Russian).
1944Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Titanium-bearing Samarskite-(Y) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/titanium-bearing-samarskite-y-29535},
  note      = {Accessed 2026-05-11}
}