Schmidite
A valid IMA mineral species
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About Schmidite
Formula:
[Zn2(Fe3+,Mn2+)2Fe3+(PO4)3(OH)3(H2O)6] · 2H2O
Colour:
orange-brown, red, copper-red
Specific Gravity:
2.89
Crystal System:
Orthorhombic
Member of:
Name:
Named in honor of Hans Schmid (1925, Wackersdorf, Bavaria - 2013, Greece), mining engineer and geologist. He discovered a very large lithium phosphate occurrence in the Hagendorf Süd pegmatite that was mined from 1950-1955, producing ~1600 tons of lithium ore. In 1955 he published a seminal paper on the textures and structures of pegmatites of the Oberpfälzer.
Unique Identifiers
Mindat ID:
51842
Long-form identifier:
mindat:1:1:51842:6
GUID
(UUID V4):
(UUID V4):
bd4662d0-09d0-4c62-a5e0-4c020525cebb
IMA Classification of Schmidite
Approved
IMA Formula:
Zn(Fe3+0.5Mn2+0.5)2ZnFe3+(PO4)3(OH)3(H2O)8
Approval year:
2017
First published:
2019
Classification of Schmidite
8.DB.07
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
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 |
---|---|---|
Smd | 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 Schmidite
Colour:
orange-brown, red, copper-red
Comment:
Not reported
Tenacity:
Brittle
Cleavage:
Perfect
{010}
{010}
Density:
2.89 g/cm3 (Measured) 2.82 g/cm3 (Calculated)
Optical Data of Schmidite
Type:
Biaxial (+)
RI values:
nα = 1.640 - 1.644 nβ = 1.679 - 1.681 nγ = 1.733 - 1.737
2V:
Measured: 81.4° (8), Calculated: 81.8°
Max Birefringence:
δ = 0.093
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
None
Pleochroism:
Visible
Comments:
X = light brown, Y = medium brown, Z = dark red brown
Absorption X < Y < Z
Absorption X < Y < Z
Comments:
Orientation X = b, Y = c, Z = a
Chemistry of Schmidite
Mindat Formula:
[Zn2(Fe3+,Mn2+)2Fe3+(PO4)3(OH)3(H2O)6] · 2H2O
Crystallography of Schmidite
Crystal System:
Orthorhombic
Cell Parameters:
a = 11.002(1) Å, b = 25.310(2) Å, c = 6.390(1) Å
Ratio:
a:b:c = 0.435 : 1 : 0.252
Unit Cell V:
1,779.36 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Laths, elongated on [100] and flattened on {010}
Comment:
Spacegroup: Pmab
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
12.73 Å | (100) |
8.347 Å | (39) |
5.514 Å | (32) |
5.424 Å | (26) |
3.753 Å | (32) |
3.174 Å | (33) |
2.761 Å | (95) |
2.714 Å | (26) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Schmidite
General Appearance of Type Material:
Radiating sprays of orange-brown to copper-red laths.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Museums Victoria, Melbourne, Australia, registration number M53810 and M53811
Geological Setting of Type Material:
Zoned granitic phosphate pegmatite. On/near altered phosphophyllite in a corroded triphylite nodule.
Associated Minerals at Type Locality:
Reference:
Grey, I.E., Keck, E., Kampf, A.R., MacRae, C.M., Glenn, A.M., Cashion, J., Gozukara, Y. (2019) Schmidite and wildenauerite, two new schoonerite-group minerals from the Hagendorf Süd pegmatite, Oberpfalz, Bavaria. Mineralogical Magazine: 83(2): 181-190.
Synonyms of Schmidite
Relationship of Schmidite to other Species
Member of:
Other Members of this group:
Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O | Orth. mmm (2/m 2/m 2/m) : Pbam |
Wildenauerite | Zn(Fe3+,Mn2+)2MnFe3+(PO4)3(OH)3(H2O)6 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pbam |
Wilhelmgümbelite | ZnFe2+Fe3+3(PO4)3(OH)4(H2O)5 · 2H2O | Orth. mmm (2/m 2/m 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Schmidite associated with Rockbridgeite | Fe2+Fe3+4(PO4)3(OH)5 |
Related Minerals - Strunz-mindat Grouping
8.DB. | Arangasite | Al2F(PO4)(SO4) · 9H2O |
8.DB. | Camaronesite | [Fe3+(H2O)2(PO3OH)]2(SO4) · 1-2H2O |
8.DB. | Höslite | Fe3+3(VO4)2(SO4)(OH)(H2O)4 · 3H2O |
8.DB.05 | Diadochite | Fe3+2(PO4)(SO4)(OH) · 6H2O |
8.DB.05 | Pitticite | (Fe, AsO4, H2O) (?) |
8.DB.05 | Destinezite | Fe3+2(PO4)(SO4)(OH) · 6H2O |
8.DB.07 | Wilhelmgümbelite | ZnFe2+Fe3+3(PO4)3(OH)4(H2O)5 · 2H2O |
8.DB.07 | Wildenauerite | Zn(Fe3+,Mn2+)2MnFe3+(PO4)3(OH)3(H2O)6 · 2H2O |
8.DB.10 | Vashegyite | Al11(PO4)9(OH)6 · 38H2O |
8.DB.15 | Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O |
8.DB.20 | Sinkankasite | Mn2+Al(PO3OH)2(OH) · 6H2O |
8.DB.25 | Mitryaevaite | Al6(PO4)((P,S)O3(OH,O))2F2(OH)2 · 14.5H2O |
8.DB.30 | Sanjuanite | Al2(PO4)(SO4)(OH) · 9H2O |
8.DB.35 | Sarmientite | Fe3+2(AsO4)(SO4)(OH) · 5H2O |
8.DB.40 | Bukovskýite | Fe3+2(AsO4)(SO4)(OH) · 9H2O |
8.DB.40 | Flurlite | Zn3Mn2+Fe3+(PO4)3(OH)2 · 9H2O |
8.DB.40 | Manganflurlite | ZnMn2+3Fe3+(PO4)3(OH)2(H2O)7 · 2H2O |
8.DB.42 | Bohuslavite | Fe3+4(PO4)3(SO4)(OH) · nH2O |
8.DB.45 | Zýkaite | Fe3+4(AsO4)3(SO4)(OH) · 15H2O |
8.DB.47 | Lapeyreite | Cu3O[AsO3(OH)]2 · 0.75H2O |
8.DB.50 | Giniite | Fe2+Fe3+4(PO4)3(OH)5 · 2H2O |
8.DB.50 | Rossiantonite | Al3(PO4)(SO4)2(OH)2(H2O)14 |
8.DB.52 | Arctowskite | Al9(PO4)8(OH)3 · 27H2O |
8.DB.55 | Sasaite | (Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O |
8.DB.60 | Mcauslanite | Fe3Al2(PO4)3(PO3OH)F · 18H2O |
8.DB.65 | Goldquarryite | CuCd2Al3(PO4)4F2(H2O,F)2 · 10H2O |
8.DB.70 | Birchite | Cd2Cu2(PO4)2(SO4) · 5H2O |
8.DB.75 | Braithwaiteite | NaCu5(Ti4+Sb5+)(AsO4)4(HAsO4)2O2 · 8H2O |
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 Schmidite
mindat.org URL:
https://www.mindat.org/min-51842.html
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Please feel free to link to this page.
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References for Schmidite
Reference List:
Localities for Schmidite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
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Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany