Pertlikite (original) (raw)

A valid IMA mineral species

About PertlikiteHide

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Formula:

K2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2O

Colour:

Dark olive green to black

Crystal System:

Tetragonal

Name:

In honour of Franz Pertlik (b. 1943), Professor of Mineralogy and Crystallography, University of Vienna, Austria, in recognition of his extensive work on the crystal chemistry of minerals.

Voltaite Group. Chemically related to magnesiovoltaite. One of a few ferrous-ferric sulfate minerals, by bílinite, copiapite, römerite (purely Fe minerals), metavoltine, and voltaite.

Tetragonal-pseudocubic due to ordering of Fe and Mg.

An apparently cubic (a = 27.220 Å) pertlikite-related mineral with the formula [K0.73(NH4)0.27]2(Mg,Al,Fe)62+(Fe0.93Al0.07)23+Al(SO4)12·18H2O and unknown Fe(II):Fe(III) ratio was described by Witzke et al. (2015).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:36064:3

c71c6d62-e9b2-4899-85ab-1c5f43e99834

IMA Classification of PertlikiteHide

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IMA Formula:

K2(Fe2+,Mg)2(Mg,Fe3+)4Fe3+2Al(SO4)12 · 18H2O

Classification of PertlikiteHide

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7.CC.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations

29.9.1.3

29 : HYDRATED ACID AND NORMAL SULFATES
9 : Miscellaneous

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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of PertlikiteHide

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Colour:

Dark olive green to black

Density:

2.59(3) g/cm3 (Measured) 2.56(1) g/cm3 (Calculated)

Optical Data of PertlikiteHide

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RI values:

_n_ω = 1.590(2) _n_ε = 1.586(2)

δ = 0.004

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

Chemistry of PertlikiteHide

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Mindat Formula:

K2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2O

Crystallography of PertlikiteHide

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Crystal System:

Tetragonal

Class (H-M):

4/m m m _(_4/_m_2/_m_2/m ) - Ditetragonal Dipyramidal

Cell Parameters:

a = 19.2080 Å, c = 27.2158 Å

Unit Cell V:

10,041.19 ų (Calculated from Unit Cell)

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0006190	Pertlikite	Ertl A, Dyar M D, Hughes J M, Brandstatter F, Gunter M E, Prem M, Peterson R C (2008) Pertlikite, a new tetragonal Mg-rich member of the voltaite group from Madeni Zakh, Iran The Canadian Mineralogist 46 661-669		2008	Madeni Zakh, Iran	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of PertlikiteHide

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General Appearance of Type Material:

Single crystals up to 1 cm.

Place of Conservation of Type Material:

Institute for Mineralogy and Crystallography, University of Vienna, Austria (7813).
National Museum of Natural History, Washington, D.C., USA (NMNH174370).
Museum of Natural History, Harvard University, Cambridge, Massachusetts, USA, (135547).

Geological Setting of Type Material:

Pyrite-bearing trachytic eruptive rock. It probably formed after the decomposition of pyrite.

Associated Minerals at Type Locality:

Synonyms of PertlikiteHide

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Relationship of Pertlikite 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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Fluorescence of PertlikiteHide

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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 PertlikiteHide

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References for PertlikiteHide

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Reference List:

Ertl, A.; Dyar, M.D.; Hughes, J.M.; Brandstätter, F.; Gunter, M.E.; Prem, M.; Peterson, R.C. (2008): Pertlikite, a new tetragonal Mg-rich member of the voltaite group from Madeni Zakh, Iran. The Canadian Mineralogist, 46, 661-669.

Majzlan, Juraj, Schlicht, Hannes, Wierzbicka-Wieczorek, Maria, Giester, Gerald, Pöllmann, Herbert, Brömme, Beatrix, Doyle, Stephen, Buth, Gernot, Bender Koch, Christian (2013) A contribution to the crystal chemistry of the voltaite group: solid solutions, Mössbauer and infrared spectra, and anomalous anisotropy. Mineralogy and Petrology, 107 (2) 221-233 doi:10.1007/s00710-012-0254-2

Localities for PertlikiteHide

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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.