Mineralogy Database

Hellandite-(Y) Mineral Data

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General Hellandite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Ca,REE)4(Y,Ce)2(Al,[ ])2[Si4B4O22](OH)2
Help on Composition: Composition: Molecular Weight = 1,029.47 gm
   Calcium          11.68 %  Ca   16.34 % CaO
   Cerium            6.81 %  Ce    7.97 % Ce2O3
   La,Ce,Pr,Nd,Sm,  13.99 %  RE   16.32 % REE2O3
   Yttrium          12.95 %  Y    16.45 % Y2O3
   Aluminum          1.97 %  Al    3.71 % Al2O3
   Silicon          10.91 %  Si   23.35 % SiO2
   Boron             4.20 %  B    13.53 % B2O3
   Hydrogen          0.20 %  H     1.75 % H2O
   Oxygen           37.30 %  O
                   ______        ______ 
                   100.00 %       99.42 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3REEY1.5Ce0.5Al0.75(Si4B4O22)(OH)2
Help on Environment: Environment: Pegmatite
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1903
Help on Locality: Locality: Kragero, Telemark, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Amund Theodor Helland (1846-1918), geologist of Oslo, Norway.
Help on Name Pronunciation: Name Pronunciation: Hellandite-(Y) + Pronunciation Say HELLANDITE-(Y)
Help on Synonym: Synonym: Hellandite
  ICSD 100145
  IMA2000-F
  PDF 25-184