Ramosite
A valid IMA mineral species - pending publication
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About Ramosite
Formula:
Pb25.7Sn8.3Mn3.4Sb6.4S56.2
Crystal System:
Monoclinic
Member of:
The Mn analogue of franckeite. Unique combination of elements.
Cell parameters for H-slab: a = 6.23, b = 3.69, c = 17.59 Å, β = 93.3°.
Cell parameters for H-slab: a = 6.23, b = 3.69, c = 17.59 Å, β = 93.3°.
Unique Identifiers
Mindat ID:
54278
Long-form identifier:
mindat:1:1:54278:8
Similar Names
| Amosite | A variety of Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| Lamosite | A synonym of 'Lamalginite' | |
| Ramzaite | A synonym of Lorenzenite |
IMA Classification of Ramosite
Approved, Pending publication
IMA Formula:
Pb2+25.7Sn4+8.3Mn2+3.4Sb3+6.4S2-56.2
Approval year:
2020
Classification of Ramosite
2.HF.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rms | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Ramosite
Mindat Formula:
Pb25.7Sn8.3Mn3.4Sb6.4S56.2
Element Weights:
Crystallography of Ramosite
Crystal System:
Monoclinic
Cell Parameters:
a = 5.82 Å, b = 5.92 Å, c = 17.65 Å
β = 99.1°
β = 99.1°
Ratio:
a:b:c = 0.983 : 1 : 2.981
Unit Cell V:
600.47 ų (Calculated from Unit Cell)
Comment:
Cell Parameters for Q-slab; Spacegroup: C2∕m (Q-slab), P21 (H-slab)(CNMNC Newsletter 53)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.48–3.59 Å | (58) |
| 3.23–3.32 Å | (13) |
| 3.13–3.20 Å | (4) |
| 2.86–3.09 Å | (100) |
| 2.54–2.59 Å | (7) |
| 2.36–2.42 Å | (14) |
| 2.18–2.25 Å | (73) |
| 1.96–2.07 Å | (43) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Ramosite
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Naturhistorisches Museum Wien, Burgring 7, 1010 Vienna, Austria, catalogue number O1798, and the Mineralogical & Geological Museum, Harvard University, Cambridge, Massachusetts 02138, USA, specimen numbers 2019.18.1 and 2019.18.2
Synonyms of Ramosite
Other Language Names for Ramosite
Relationship of Ramosite to other Species
Member of:
Other Members of Franckeite Group:
| Coiraite | (Pb,Sn)12.5Sn5FeAs3S28 | Mon. |
| Franckeite | Fe2+(Pb,Sn2+)6Sn4+2Sb2S14 | Tric. 1 : P1 |
Related Minerals - Strunz-mindat Grouping
| 2.HF.20 | Vrbaite | Hg3Tl4As8Sb2S20 |
| 2.HF.25b | Franckeite | Fe2+(Pb,Sn2+)6Sn4+2Sb2S14 |
| 2.HF.25a | Merelaniite | Mo4Pb4VSbS15 |
| 2.HF.25a | Abramovite | Pb2SnInBiS7 |
| 2.HF.25a | Lévyclaudite | Pb8Sn7Cu3(Bi,Sb)3S28 |
| 2.HF.25a | Cylindrite | Pb3Sn4FeSb2S14 |
| 2.HF.25b | 'Potosíite' | Pb6Sn3FeSb3S16 |
| 2.HF.25b | Coiraite | (Pb,Sn)12.5Sn5FeAs3S28 |
| 2.HF.25b v | 'Plumbostannite' | Pb2Fe2Sn2Sb2S11 |
| 2.HF.30 | Lengenbachite | Ag4Cu2Pb18As12S39 |
Other Information
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 Ramosite
mindat.org URL:
https://www.mindat.org/min-54278.html
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References for Ramosite
Localities for Ramosite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Peru (TL) | |
| Miyawaki et al. (2020) |
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Uchucchacua Mine, Uchucchacua area, Oyón District, Oyón Province, Lima, Peru