Metaköttigite (original) (raw)

A valid IMA mineral species

About MetaköttigiteHide

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Formula:

(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)

Name:

For the relation to köttigite.

Formed by both oxidation and dehydrogenization of ferroan kottigite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2678:5

30837e0a-9b01-4535-868a-e01fa2b0f548

IMA Classification of MetaköttigiteHide

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IMA Formula:

(Zn,Fe3+)3(AsO4)2 · 8(H2O,OH)

Type description 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

Classification of MetaköttigiteHide

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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

40.3.8.2

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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of MetaköttigiteHide

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Optical Data of MetaköttigiteHide

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RI values:

_n_α = 1.648(3) _n_β = 1.680(1) _n_γ = 1.716(2)

2V:

Measured: 93° , Calculated: 90°

δ = 0.068

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X = dark blue, Y = yellow, Z = pale yellow.

Chemistry of MetaköttigiteHide

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Mindat Formula:

(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)

Crystallography of MetaköttigiteHide

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Class (H-M):

1 - Pinacoidal

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)°

Ratio:

a:b:c = 0.843 : 1 : 0.5

Unit Cell V:

331.75 ų (Calculated from Unit Cell)

Twinning:

Universal on {110}.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Very similar to the data of symplesite.

Geological EnvironmentHide

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Type Occurrence of MetaköttigiteHide

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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 MetaköttigiteHide

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Other Language Names for MetaköttigiteHide

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Relationship of Metaköttigite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 MetaköttigiteHide

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References for MetaköttigiteHide

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Reference List:

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

Localities for MetaköttigiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- 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.