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Romanèchite ((Ba,H2O)2(Mn4+,Mn3+)5O10) is the
primary constituent of psilomelane,
which is a
mixture of minerals. Most
psilomelane is not pure romanechite...
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group name for hard
black manganese oxides including hollandite and
romanechite.
Psilomelane consists of
hydrous manganese oxide with
variable amounts...
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Rickardite Riebeckite Ringwoodite Roaldite Robertsite Rodalquilarite Romanèchite Romeite Rosasite Roscoelite Roselite Rosenbergite Rosickýite Routhierite...
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branching in one or more
direction from
central point copper, gold,
romanechite, magnesite,
silver Druse/Encrustation
Aggregate of
crystals coating a...
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reference to its use as a way to
remove tints from gl****.
Pyrolusite and
romanechite are
among the most
common manganese minerals.
Pyrolusite occurs ****ociated...
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coronadite (PbMn 8O 16)
cryptomelane (KMn 8O 16)
hollandite (BaMn 8O 16)
romanechite ((Ba,H 2O)Mn 5O 10)
todorokite ((Ba,Mn,Mg,Ca,K,Na) 2Mn 3O 12•3H 2O) and...
- Rhabdophane-(Y) Rha-Y
Rollandite Rol
Rucklidgeite Ruk
Raspite Rsp
Rheniite Rhn
Romanèchite Rmn Rudabányaite Rdb
Rastsvetaevite Rvt Rhod****nide Rda Romanorlovite...
- Mn)(Nb,Ta)2O6
Hydroxide subgroup:
Brucite Mg(OH)2
Manganite MnO(OH)
Romanèchite BaMn2+Mn4+8O16(OH)4
Goethite group:
Diaspore αAlO(OH)
Goethite αFeO(OH)...
- phosphohedyphane, plumbogummite, pollucite, purpurite, quartz, ranciéite,
romanèchite, saponite, spessartine, stib****n, stibiocolumbite, stibiotantalite,...
- pyrolusite. It
occurs in
mixtures with "psilomelane" (recently
renamed to
romanechite) and with
other manganese oxides in an iron
oxide deposit, most likely...
