Milanriederite
A valid IMA mineral species
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About Milanriederite
Milan Rieder
Formula:
(Ca18[REE])Fe3+Al4(Mg4Al4)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9
According to Mössbauer data, all iron in the mineral is trivalent.
The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.
Note: The published formula by Chukanov et al. (2019) includes ∑(REE+Y) = 1.97 apfu (primarily in the X3 site), although this amount does not dominate the site and so might be disregarded when considering the end-member formula. However, the extra charge afforded by this REE inclusion appears necessary to provide charge balance for defining M2+>M3+ in the Y3 site, as full hydrogenation of the "O10" and "O11" positions would be otherwise insufficient.
To address this inconsistency and to closer approximate the published analysis, one apfu of REE is included in the presented formula to maintain charge balance (although other charge-balancing mechanisms, such as the addition of B into the normally vacant T1 and/or T2 sites, may also be possible).
The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.
Note: The published formula by Chukanov et al. (2019) includes ∑(REE+Y) = 1.97 apfu (primarily in the X3 site), although this amount does not dominate the site and so might be disregarded when considering the end-member formula. However, the extra charge afforded by this REE inclusion appears necessary to provide charge balance for defining M2+>M3+ in the Y3 site, as full hydrogenation of the "O10" and "O11" positions would be otherwise insufficient.
To address this inconsistency and to closer approximate the published analysis, one apfu of REE is included in the presented formula to maintain charge balance (although other charge-balancing mechanisms, such as the addition of B into the normally vacant T1 and/or T2 sites, may also be possible).
Colour:
Dark brownish-red
Hardness:
6
Specific Gravity:
3.53
Crystal System:
Tetragonal
Member of:
Name:
The mineral is named in honour of Czech mineralogist Professor Milan Rieder (b. 1940), in recognition to his contributions to mineralogy and his service to the international mineralogical community.
This page provides mineralogical data about Milanriederite.
Unique Identifiers
Mindat ID:
53137
Long-form identifier:
mindat:1:1:53137:5
IMA Classification of Milanriederite
Approved
IMA Formula:
(Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10
Approval year:
2018
First published:
2019
Type description reference:
Chukanov, Nikita V., Panikorovskii, Taras L., Goncharov, Alexey G., Pekov, Igor V., Belakovskiy, Dmitriy I., Britvin, Sergey N., Möckel, Steffen, Vozchikova, Svetlana A. (2019) Milanriederite, (Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10, a new vesuvianite-group mineral from the Kombat Mine, Namibia. European Journal of Mineralogy, 31 (3) 637-646 doi:10.1127/ejm/2019/0031-2856
Classification of Milanriederite
9.BG.35
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
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 |
|---|---|---|
| Mlrd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Milanriederite
Transparency:
Translucent
Colour:
Dark brownish-red
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None
Fracture:
Irregular/Uneven
Density:
3.53(2) g/cm3 (Measured) 3.547 g/cm3 (Calculated)
Optical Data of Milanriederite
Type:
Uniaxial (-)
RI values:
nω = 1.744(3) nε = 1.737(3)
Max. Birefringence:
δ = 0.007
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Optical Extinction:
Parallel
Pleochroism:
Visible
Comments:
Brownish-pink (O) to nearly colourless (E).
Chemistry of Milanriederite
Mindat Formula:
(Ca18[REE])Fe3+Al4(Mg4Al4)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9
According to Mössbauer data, all iron in the mineral is trivalent.
The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.
Note: The published formula by Chukanov et al. (2019) includes ∑(REE+Y) = 1.97 apfu (primarily in the X3 site), although this amount does not dominate the site and so might be disregarded when considering the end-member formula. However, the extra charge afforded by this REE inclusion appears necessary to provide charge balance for defining M2+>M3+ in the Y3 site, as full hydrogenation of the "O10" and "O11" positions would be otherwise insufficient.
To address this inconsistency and to closer approximate the published analysis, one apfu of REE is included in the presented formula to maintain charge balance (although other charge-balancing mechanisms, such as the addition of B into the normally vacant T1 and/or T2 sites, may also be possible).
According to Mössbauer data, all iron in the mineral is trivalent.
The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.
Note: The published formula by Chukanov et al. (2019) includes ∑(REE+Y) = 1.97 apfu (primarily in the X3 site), although this amount does not dominate the site and so might be disregarded when considering the end-member formula. However, the extra charge afforded by this REE inclusion appears necessary to provide charge balance for defining M2+>M3+ in the Y3 site, as full hydrogenation of the "O10" and "O11" positions would be otherwise insufficient.
To address this inconsistency and to closer approximate the published analysis, one apfu of REE is included in the presented formula to maintain charge balance (although other charge-balancing mechanisms, such as the addition of B into the normally vacant T1 and/or T2 sites, may also be possible).
Element Weights:
Crystallography of Milanriederite
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nnc
Setting:
P4/nnc
Cell Parameters:
a = 15.6578(4) Å, c = 11.8597(5) Å
Ratio:
a:c = 1 : 0.757
Unit Cell V:
2,907.60 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Type material:
The major crystal form is {111} and the minor forms (observed on some crystals) are {001}, {110}, and {100}.
The major crystal form is {111} and the minor forms (observed on some crystals) are {001}, {110}, and {100}.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.970 Å | (50) |
| 2.774 Å | (100) |
| 2.617 Å | (87) |
| 2.481 Å | (30) |
| 2.143 Å | (19) |
| 1.676 Å | (17) |
| 1.628 Å | (38) |
| 1.570 Å | (12) |
Reference:
Chukanov, Nikita V., Panikorovskii, Taras L., Goncharov, Alexey G., Pekov, Igor V., Belakovskiy, Dmitriy I., Britvin, Sergey N., Möckel, Steffen, Vozchikova, Svetlana A. (2019) Milanriederite, (Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10, a new vesuvianite-group mineral from the Kombat Mine, Namibia. European Journal of Mineralogy, 31 (3) 637-646 doi:10.1127/ejm/2019/0031-2856
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 8 : Mafic igneous rocks | |
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Milanriederite
General Appearance of Type Material:
Dipyramidal crystals up to 3 mm across.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5224/1.
Geological Setting of Type Material:
Hydrothermal and metasomatic replacement and fracture-filling of
dolostones by polymineralic aggregates.
dolostones by polymineralic aggregates.
Associated Minerals at Type Locality:
Reference:
Chukanov, Nikita V., Panikorovskii, Taras L., Goncharov, Alexey G., Pekov, Igor V., Belakovskiy, Dmitriy I., Britvin, Sergey N., Möckel, Steffen, Vozchikova, Svetlana A. (2019) Milanriederite, (Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10, a new vesuvianite-group mineral from the Kombat Mine, Namibia. European Journal of Mineralogy, 31 (3) 637-646 doi:10.1127/ejm/2019/0031-2856
Synonyms of Milanriederite
Other Language Names for Milanriederite
Dutch:Milanriederiet
German:Milanriederit
Relationship of Milanriederite to other Species
Member of:
Other Members of Vesuvianite Group:
| Alumovesuvianite | Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | Tet. 4/m : P4/n |
| Cyprine | Ca19Cu2+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 | Tet. 4/m : P4/n |
| Fluorvesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(F,OH)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
| Hongheite | Ca19Fe2+Al4(Fe3+,Mg)8(◻4)B[Si2O7]4[(SiO4)10]O(OH,O)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
| Magnesiovesuvianite | Ca19MgAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 | Tet. 4/m : P4/n |
| Manaevite-(Ce) | (Ca13Ce4[H2O]2)Mg(Al3Mg)(Mg3Ti3Fe3+2)(◻4)◻[Si2O7]4[(SiO4)8(H4O4)2]O(OH)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
| Manganvesuvianite | Ca19Mn3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | Tet. 4/m : P4/n |
| Modraite | Ca19Fe2+Al4(Al6Fe2+2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
| Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
| Wiluite | Ca19MgAl4(Al,Mg)8(B,◻)4◻[Si2O7]4[(SiO4)10]O(O,OH)9 | Tet. 4/mmm(4/m2/m2/m) : P4/nnc |
Common Associates
Associations Based on Photo Data:
| 7 photos of Milanriederite associated with Hausmannite | Mn2+Mn3+2O4 |
| 3 photos of Milanriederite associated with Kombatite | Pb14(VO4)2O9Cl4 |
| 3 photos of Milanriederite associated with Baryte | BaSO4 |
| 2 photos of Milanriederite associated with Calcite | CaCO3 |
| 2 photos of Milanriederite associated with Native Copper | Cu |
Related Minerals - Strunz-mindat Grouping
| 9.BG. | Alumovesuvianite | Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| 9.BG. | Alnaperbøeite-(Ce) | Ca(Ce2.5Na0.5)(AlAl2Al)[Si2O7][SiO4]3O(OH)2 |
| 9.BG. | Zilbermintsite-(La) | (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4]5O(OH)3 |
| 9.BG. | Heflikite | (CaCa)(AlAlSc)O[Si2O7][SiO4](OH) |
| 9.BG. | Magnesiovesuvianite | Ca19MgAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
| 9.BG. | Zoisite-(Pb) | (CaPb)(AlAlAl)O[Si2O7][SiO4](OH) |
| 9.BG. | Shuiskite-(Cr) | Ca2Cr3+Cr3+2[Si2O6OH][SiO4](OH)2O |
| 9.BG. | Radekškodaite Group | |
| 9.BG.05 | Dissakisite-(La) | (CaLa)(AlAlMg)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Manganiandrosite-(Ce) | (Mn2+Ce)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Dissakisite-(Ce) | (CaCe)(AlAlMg)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Allanite-(Sm) | (CaSm)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Hancockite | (CaPb)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Dollaseite-(Ce) | (CaCe)(MgAlMg)F[Si2O7][SiO4](OH) |
| 9.BG.05a v | 'Unnamed (Ga-analogue of Epidote)' | (CaCa)(AlAlGa3+)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Epidote-(Sr) | (CaSr)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Vanadoandrosite-(Ce) | (Mn2+Ce)(V3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Vanadoallanite-(La) | (CaLa)(V3+AlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | 'Unnamed (Mg-analogue of Ferriallanite-(Ce))' | (CaCe)(Fe3+AlMg)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Ferriallanite-(La) | (CaLa)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Uedaite-(Ce) | (Mn2+Ce)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Tweddillite | (CaSr)(Mn3+AlMn3+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Åskagenite-(Nd) | (Mn2+Nd)(AlAlFe3+)O[Si2O7][SiO4]O |
| 9.BG.05 | Piemontite-(Pb) | (CaPb)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Allanite-(La) | (CaLa)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Akasakaite-(Ce) | (CaCe)(AlAlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Manganiandrosite-(La) | (Mn2+La)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Akasakaite-(La) | (CaLa)(AlAlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Vanadoakasakaite-(La) | (CaLa)(V3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Khristovite-(Ce) | (CaCe)(MgAlMn2+)F[Si2O7][SiO4](OH) |
| 9.BG.05b | Ferriakasakaite-(La) | (CaLa)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Ferriandrosite-(La) | (Mn2+La)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | 'Androsite-(Ce)' | (Mn2+Ce)(AlAlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Vielleaureite-(Ce) | Mn2+Ce(MgAlMn2+)(Si2O7)(SiO4)F(OH) |
| 9.BG.05 | Ferriandrosite-(Ce) | (Mn2+Ce)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | 'Unnamed (Mn3+-analogue of Ferriakasakaite-(Ce))' | (CaCe)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Vanadoakasakaite-(Ce) | (CaCe)(V3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Piemontite-(Sr) | (CaSr)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| 9.BG.05 | Niigataite | (CaSr)(AlAlAl)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Ferriakasakaite-(Ce) | (CaCe)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Allanite-(Nd) | (CaNd)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | 'UM1989-32-SiO:AlCaFeHREE' | (Ca0.5◻0.5REE)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 9.BG.05a | Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| 9.BG.05b | Manganiakasakaite-(La) | (CaLa)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
| 9.BG.10 | Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| 9.BG.15 | Macfallite | Ca2Mn3+3(SiO4)(Si2O7)(OH)3 |
| 9.BG.15 | Sursassite | Mn2+2Al3(SiO4)(Si2O7)(OH)3 |
| 9.BG.20 | Pumpellyite-(Al) | Ca2AlAl2[Si2O6OH][SiO4](OH)2O |
| 9.BG.20 | Shuiskite-(Mg) | Ca2MgCr3+2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Julgoldite-(Fe2+) | Ca2Fe2+Fe3+2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Okhotskite | Ca2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Julgoldite-(Mg) | Ca2MgFe3+2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Poppiite | Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O |
| 9.BG.20 | Julgoldite-(Fe3+) | Ca2Fe3+Fe3+2[Si2O6OH][SiO4](OH)2O |
| 9.BG.20 | Pumpellyite-(Fe2+) | Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Pumpellyite-(Fe3+) | Ca2Fe3+Al2[Si2O6OH][SiO4](OH)2O |
| 9.BG.20 | Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.20 | Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| 9.BG.25 | Ganomalite | Pb9Ca5Mn(Si2O7)4(SiO4)O |
| 9.BG.25 | Wayneburnhamite | Pb9Ca6(Si2O7)3(SiO4)3 |
| 9.BG.30 | Rustumite | Ca10(Si2O7)2(SiO4)(OH)2Cl2 |
| 9.BG.35 | Modraite | Ca19Fe2+Al4(Al6Fe2+2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
| 9.BG.35 | Fluorvesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(F,OH)9 |
| 9.BG.35 | Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| 9.BG.35 | Manaevite-(Ce) | (Ca13Ce4[H2O]2)Mg(Al3Mg)(Mg3Ti3Fe3+2)(◻4)◻[Si2O7]4[(SiO4)8(H4O4)2]O(OH)9 |
| 9.BG.35 | Hongheite | Ca19Fe2+Al4(Fe3+,Mg)8(◻4)B[Si2O7]4[(SiO4)10]O(OH,O)9 |
| 9.BG.35 | Wiluite | Ca19MgAl4(Al,Mg)8(B,◻)4◻[Si2O7]4[(SiO4)10]O(O,OH)9 |
| 9.BG.35 | Cyprine | Ca19Cu2+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
| 9.BG.35 | Manganvesuvianite | Ca19Mn3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| 9.BG.40 | Vyuntspakhkite-(Y) | (Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7 |
| 9.BG.45 | Dellaite | Ca6Si3O11(OH)2 |
| 9.BG.50 | Ferriperbøeite-(Ce) | CaCe3(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 |
| 9.BG.50 | Perbøeite-(La) | CaLa3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2 |
| 9.BG.50 | Perbøeite-(Ce) | CaCe3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2 |
| 9.BG.50 | Gatelite-(Ce) | CaCe3(AlAl2Mg)[Si2O7][SiO4]3O(OH)2 |
| 9.BG.50 | Ferriperbøeite-(La) | CaLa3(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 |
| 9.BG.55 | Västmanlandite-(Ce) | CaCe3(MgAl2Mg)[Si2O7][SiO4]3F(OH)2 |
| 9.BG.60 | Radekškodaite-(La) | (CaLa5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 |
| 9.BG.60 | Radekškodaite-(Ce) | (CaCe5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 |
Fluorescence of Milanriederite
Not fluorescent.
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 Milanriederite
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References for Milanriederite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter 45, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (5) 1225-1232 doi:10.1180/mgm.2018.160p.1226
Chukanov, Nikita V., Panikorovskii, Taras L., Goncharov, Alexey G., Pekov, Igor V., Belakovskiy, Dmitriy I., Britvin, Sergey N., Möckel, Steffen, Vozchikova, Svetlana A. (2019) Milanriederite, (Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10, a new vesuvianite-group mineral from the Kombat Mine, Namibia. European Journal of Mineralogy, 31 (3) 637-646 doi:10.1127/ejm/2019/0031-2856
Localities for Milanriederite
Showing 2 localities.
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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.
Namibia (TL) | |
| Hålenius et al. (2018) +1 other reference |
| Pavel M. Kartashov analytical data 2021 |
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Asis West sector, Kombat Mine, Kombat, Otavi Constituency, Otjozondjupa Region, Namibia