IMA no. 1999-016

HENRYMEYERITE

Formula

Ba(Ti₇Fe²⁺)O₁₆

Crystal data

tet

I4/m

prismatic acicular xx (0.2 mm)

Relationship to other species

related to redledgeite and mannardite; cryptomelane group: titanates subgroup 

Optical properties

opaque

black

adamantine

Physical properties

H= 5-6

D_(meas.)= 4.01

D_(calc.)= 4.20

Cell parameters and optical class

a= 10.219

b=

c= 2.963

Z= 1

refl.light gray

a= 90°

b= 90°

g= 90° 

Vų= 309.4

X-ray powder diffraction data

3.231, 2.235, 2.486, 1.598, 1.901, 1.405 (calculated parameters)

Association

dolomite, fluoroapatite, tetraferriphlogopite, catapleiite, collinsite, pyrite (see comments)

Type locality

Kovdor dolomite carbonatite deposit (Zhelezny mine), Kola Peninsula, Murmansk district, Russia

Etymology

Prof. Henry O.A. Meyer (1937-1995), petro-mineralogist, for his contribution to petrology and mineralogy of xenolits and kimberlits and his service to the mineralogical community with MSA and IMA

Bibliographical ref.

Mitchell, R.H. & al., Henrymeyerite, a new hollandite-type Ba-Fe titanate from the Kovdor complex, Russia, Can.Min. (2000), 38(3), 617-626