Strontian hollandite in a quartz schist from the Saruta-gawa area in the Sanbagawa metamorphic terrain, central Shikoku, Japan

Access this Article

Search this Article

Author(s)

Abstract

Strontian hollandite (up to 3.45 wt.% SrO) is found to occur in a piemontite-bearing quartz schist of the Sanbagawa metamorphic terrain in central Shikoku, Japan. Hollandite occurs as an aggregate of fine crystals (up to 100 μ m long) associated with braunite. From the central part of the aggregate outward, its BaO, Fe<SUB>2</SUB>O<SUB>3</SUB> and TiO<SUB>2</SUB> contents increase and its MnO<SUB>2</SUB>, K<SUB>2</SUB>O and SrO contents decrease. Chemical variation in the hollandite suggests K (Mn<SUP>4+</SUP>, Ti<SUP>4+</SUP>)⇔(Ba, Sr)Fe<SUP>3+</SUP> substitution. Hollandite is tetragonal or pseudotetragonal, and lattice constants are <I>a</I>=9.90(4) Å and <I>c</I>=2.87(5) Å.

Journal

  • Mineralogical Journal

    Mineralogical Journal 18(1), 23-30, 1996-01-01

    Japan Association of Mineralogical Sciences

References:  18

Codes

  • NII Article ID (NAID)
    10008772625
  • NII NACSIS-CAT ID (NCID)
    AA00739590
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    05442540
  • Data Source
    CJP  J-STAGE 
Page Top