Metaköttigite
A valid IMA mineral species
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About Metaköttigite
Formula:
(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)
Colour:
Bluish-gray
Crystal System:
Triclinic
Member of:
Name:
For the relation to köttigite.
Type Locality:
Dimorph of:
Formed by both oxidation and dehydrogenization of ferroan kottigite.
Unique Identifiers
Mindat ID:
2678
Long-form identifier:
mindat:1:1:2678:5
GUID
(UUID V4):
(UUID V4):
30837e0a-9b01-4535-868a-e01fa2b0f548
IMA Classification of Metaköttigite
Approved
IMA Formula:
(Zn,Fe3+)3(AsO4)2 · 8(H2O,OH)
First published:
1982
Classification of Metaköttigite
8.CE.85
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
40.3.8.2
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
20.3.19
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
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 |
---|---|---|
Mköt | 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 Metaköttigite
Transparency:
Translucent
Colour:
Bluish-gray
Cleavage:
Perfect
{110}
{110}
Optical Data of Metaköttigite
Type:
Biaxial (+)
RI values:
nα = 1.648(3) nβ = 1.680(1) nγ = 1.716(2)
2V:
Measured: 93° , Calculated: 90°
Max Birefringence:
δ = 0.068
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:
r > v
Pleochroism:
Strong
Comments:
X = dark blue, Y = yellow, Z = pale yellow.
Chemistry of Metaköttigite
Mindat Formula:
(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)
Crystallography of Metaköttigite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.96(2) Å, b = 9.44(2) Å, c = 4.72(1) Å
α = 95.6(2)°, β = 97.0(2)°, γ = 107.8(2)°
α = 95.6(2)°, β = 97.0(2)°, γ = 107.8(2)°
Ratio:
a:b:c = 0.843 : 1 : 0.5
Unit Cell V:
331.75 ų (Calculated from Unit Cell)
Z:
1
Twinning:
Universal on {110}.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
8.90 Å | (40) |
6.91 Å | (100) |
4.99 Å | (20) |
3.93 Å | (30) |
3.11 Å | (25) |
3.00 Å | (30) |
2.83 Å | (25) |
Comments:
Very similar to the data of symplesite.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Metaköttigite
General Appearance of Type Material:
Minute, bluish-gray crystals in oriented intergrowth with kottigite.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 160541.
Geological Setting of Type Material:
Oxide zone of an arsenic-rich polymetallic mineral deposit.
Associated Minerals at Type Locality:
Reference:
Schmetzer, K., Amthauer, G., Stähle, V., Medenbach, O. (1982) Metaköttigit, (Zn,Fe3+)(Zn,Fe3+,Fe2+)2(AsO4)2·8(H2O,OH), ein neues mineral aus Mapimi, Mexiko. Neues Jahrbuch für Mineralogie, Monatshefte: 1982: 506-518.
Synonyms of Metaköttigite
Other Language Names for Metaköttigite
German:Metakoettigit
Metaköttigit
Metaköttigit
Spanish:Metakoettigita
Metaköttigita
Metaköttigita
Relationship of Metaköttigite to other Species
Member of:
Other Members of this group:
Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O | Mon. |
Symplesite | Fe2+3(AsO4)2 · 8H2O | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
8.CE.X | Babánekite | Cu3(AsO4)2 · 8H2O |
8.CE. | Monteneroite | Cu2+Mn2+2(AsO4)2 · 8H2O |
8.CE.05 | Chudobaite | (Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O |
8.CE.05 | Geigerite | Mn2+5(AsO4)2(HAsO4)2 · 10H2O |
8.CE.10 | Newberyite | Mg(PO3OH) · 3H2O |
8.CE.15 | Brassite | Mg(HAsO4) · 4H2O |
8.CE.20 | Phosphorrösslerite | Mg(PO3OH) · 7H2O |
8.CE.20 | Rösslerite | Mg(HAsO4) · 7H2O |
8.CE.25 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O |
8.CE.25 | Switzerite | Mn2+3(PO4)2 · 7H2O |
8.CE.30 | Lindackerite | CuCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Ondrušite | CaCu4(AsO4)2(HAsO4)2 · 10H2O |
8.CE.30 | Veselovskýite | ZnCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Pradetite | CoCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Klajite | MnCu4(AsO4)2(HAsO4)2 · 9-10H2O |
8.CE.30 | Hloušekite | (Ni,Co)Cu4(AsO4)2(AsO3OH)2 · 9H2O |
8.CE.35 | Bobierrite | Mg3(PO4)2 · 8H2O |
8.CE.40 | Annabergite | Ni3(AsO4)2 · 8H2O |
8.CE.40 | Arupite | Ni3(PO4)2 · 8H2O |
8.CE.40 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O |
8.CE.40 | Erythrite | Co3(AsO4)2 · 8H2O |
8.CE.40 | Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O |
8.CE.40 | Hörnesite | Mg3(AsO4)2 · 8H2O |
8.CE.40 | Köttigite | Zn3(AsO4)2 · 8H2O |
8.CE.40 | Manganohörnesite | Mn2+3(AsO4)2 · 8H2O |
8.CE.40 | Parasymplesite | Fe2+3(AsO4)2 · 8H2O |
8.CE.40 | Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
8.CE.40 | Pakhomovskyite | Co3(PO4)2 · 8H2O |
8.CE.45 | Symplesite | Fe2+3(AsO4)2 · 8H2O |
8.CE.50 | Cattiite | Mg3(PO4)2 · 22H2O |
8.CE.55 | Koninckite | Fe3+PO4 · 3H2O |
8.CE.60 | Kaňkite | FeAsO4 · 3.5H2O |
8.CE.60 | Hilarionite | Fe3+2(SO4)(AsO4)(OH) · 6H2O |
8.CE.65 | Steigerite | Al(VO4) · 3H2O |
8.CE.70 | Metaschoderite | Al2(PO4)(VO4) · 6H2O |
8.CE.70 | Schoderite | Al2(PO4)(VO4) · 8H2O |
8.CE.75 | Malhmoodite | FeZr(PO4)2 · 4H2O |
8.CE.75 | Zigrasite | MgZr(PO4)2 · 4H2O |
8.CE.75 | UM2009-11-PO:CaHZr | CaZr[PO4]2 · 4H2O |
8.CE.80 | Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O |
8.CE.90 | Slavkovite | Cu13(AsO4)6(AsO3OH)4 · 23H2O |
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 Metaköttigite
mindat.org URL:
https://www.mindat.org/min-2678.html
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References for Metaköttigite
Reference List:
Localities for Metaköttigite
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.
Mexico (TL) | |
| Schmetzer et al. (1982) +1 other reference |
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Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico