UM1969-14-SiO:FeHMn
A material that is NOT an approved mineral species
This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Mn,Fe)9Si12O30(OH)6 · 10H2O
Also given as Mn4Fe3Si12O30(OH)3•8H2O
Colour:
Dark red
Lustre:
Adamantine
Crystal System:
Monoclinic
Reported as "Red Mn-silicate". Chemically comparable to bementite, 'brokenhillite', guidottiite. Suggested as a possible polytype of sepiolite.
The formula is comparable to that given for so-called "Mn-ferrisepiolite" or "Mn-sepiolite" by the same author (Semenov), the latter phase now known as yofortierite.
Occurs with "Mn sepiolite" in foyaite pegmatite at Mt. Nakalak, Ilimaussaq complex, Greenland. Associated minerals are a pyrochlore and polylithionite. The phase forms isometric to spherulitic accumulations, up to 1 cm, consisting of platy crystals up to 3 x 2 x 0.5 mm.
The formula is comparable to that given for so-called "Mn-ferrisepiolite" or "Mn-sepiolite" by the same author (Semenov), the latter phase now known as yofortierite.
Occurs with "Mn sepiolite" in foyaite pegmatite at Mt. Nakalak, Ilimaussaq complex, Greenland. Associated minerals are a pyrochlore and polylithionite. The phase forms isometric to spherulitic accumulations, up to 1 cm, consisting of platy crystals up to 3 x 2 x 0.5 mm.
Unique Identifiers
Mindat ID:
47185
Long-form identifier:
mindat:1:1:47185:1
GUID
(UUID V4):
(UUID V4):
afed41fc-2faf-410b-b286-f0ea58fdf664
Physical Properties of UM1969-14-SiO:FeHMn
Chemical Properties of UM1969-14-SiO:FeHMn
Formula:
(Mn,Fe)9Si12O30(OH)6 · 10H2O
Also given as Mn4Fe3Si12O30(OH)3•8H2O
Also given as Mn4Fe3Si12O30(OH)3•8H2O
Crystallography of UM1969-14-SiO:FeHMn
Crystal System:
Monoclinic
Cell Parameters:
a = 33.5 Å, b = 32.2 Å, c = 27.6 Å
β = 95o30'°
β = 95o30'°
Ratio:
a:b:c = 1.04 : 1 : 0.857
Unit Cell V:
29,658.83 ų (Calculated from Unit Cell)
Comment:
Parameters from single crystal study
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.59 Ã… | (50) |
| 2.77 Ã… | (80) |
| 2.65 Ã… | (90) |
| 2.44 Ã… | (70) |
| 2.22 Ã… | (50) |
| 1.599 Ã… | (60) |
Other Information
IR Spectrum:
OH and molecular water confirmed
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for UM1969-14-SiO:FeHMn
mindat.org URL:
https://www.mindat.org/min-47185.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for UM1969-14-SiO:FeHMn
Reference List:
