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Plechovite

A valid IMA mineral species - pending publication

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Discuss Plechovite

Edit Plechovite Add Synonym Edit CIF structures Clear Cache

Formula:

Ca₂[K(H₂O)]KBe₃Si₁₂O₃₀

Crystal System:

Hexagonal

Member of:

Osumilite Group

Type Locality:

ⓘ Jordanów granite quarry, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland

This page provides mineralogical data about Plechovite.

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Unique IdentifiersHide

Mindat ID:

499620

Long-form identifier:

mindat:1:1:499620:6

IMA Classification of PlechoviteHide

IMA status:

Approved, Pending publication

Classification of PlechoviteHide

Strunz-mindat (2026):

9.CM.

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si₆O₁₈]₁₂- 6-membered double rings (sechser-Doppelringe)

Mineral SymbolsHide

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
Plc	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Chemistry of PlechoviteHide

Mindat Formula:

Ca₂[K(H₂O)]KBe₃Si₁₂O₃₀

Element Weights:

Element	% weight
O	48.606 %
Si	33.028 %
Ca	7.855 %
K	7.663 %
Be	2.650 %
H	0.198 %

Calculated from ideal end-member formula.

Elements listed:

Be, Ca, H, K, O, Si - search for minerals with similar chemistry

Crystallography of PlechoviteHide

Crystal System:

Hexagonal

Class (H-M):

6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal

Space Group:

P6/mcc

Cell Parameters:

a = 10.4014(2) Å, c = 13.6982(3) Å

Ratio:

a:c = 1 : 1.317

Unit Cell V:

1,283.45 Å³ (Calculated from Unit Cell)

Comment:

space group P6/mmc

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
6.85 Å	(26)
5.20 Å	(25)
4.50 Å	(36)
4.14 Å	(46)
3.42 Å	(22)
3.30 Å	(100)
3.00 Å	(45)
2.86 Å	(92)

Locality:

Jordanów granite quarry, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland

Reference:

Pieczka, A., Gołębiowska, B., Stachowicz, M., Kotowski, J., Nejbert, K. and Hawthorne, F.C. (2026) Plechovite, IMA 2025-045. CNMNC Newsletter 90, Mineralogical Magazine, 90, https://doi.org/10.1180/mgm.2026.

Type Occurrence of PlechoviteHide

Type Locality:

ⓘ Jordanów granite quarry, Gmina Jordanów Śląski, Wrocław County, Lower Silesian Voivodeship, Poland

Place of Conservation of Type Material:

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninsky Pr. 18-2, 119071 Moscow, Russia, registration number 6274/1

Relationship of Plechovite to other SpeciesHide

Member of:

Osumilite Group

Other Members of Osumilite Group:

Agakhanovite-(Y)	K◻₂(YCa)Be₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Almarudite	K◻₂Mn²⁺₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
Aluminosugilite	KNa₂Al₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Armenite	Ba(H₂O)₂Ca₂Al₃[Al₃Si₉O₃₀]	Orth. mmm (2/m 2/m 2/m) : Pnna
Berezanskite	K◻₂Ti₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Brannockite	K◻₂Sn₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Chayesite	K◻₂Mg₂(Mg₂Fe³⁺)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Darapiosite	KNa₂Mn₂(Zn₂Li)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Dusmatovite	K(K◻)Mn²⁺₂Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Eifelite	KNa₂(MgNa)Mg₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Friedrichbeckeite	K(◻Na)Mg₂(Be₂Mg)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite	K◻₂(Fe²⁺Fe³⁺)Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
Laurentthomasite	K◻₂Mg₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Merrihueite	K(◻Na)Fe²⁺₂Fe²⁺₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Oftedalite	K◻₂(ScCa)Be₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite	K◻₂Fe²⁺₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite-(Mg)	K◻₂Mg₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Poudretteite	K◻₂Na₂B₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Roedderite	K(◻Na)Mg₂Mg₃[Si₁₂O₃₀]	Hex. 6 m2 : P6₂c
Shibkovite	K(◻K)Ca₂Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Sogdianite	K◻₂Zr₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Sugilite	KNa₂Fe³⁺₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Trattnerite	◻(◻)₂Fe³⁺₂Mg₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
'UM1990-73-SiO:KMnNaZn'	K(KNa_0.5◻_0.5)(Mn_1.5Na_0.5)Zn₃[Si₁₂O₃₀]	Hex.
'Unnamed (Mn3+-dominant analog of Sugilite)'	KNa₂Mn³⁺₂Li₃[Si₁₂O₃₀]
Yagiite	Na◻₂Mg₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Related Minerals - Strunz-mindat Grouping Hide

9.CM.	Agakhanovite-(Y)	K◻₂(YCa)Be₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Friedrichbeckeite	K(◻Na)Mg₂(Be₂Mg)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Laurentthomasite	K◻₂Mg₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	'UM1990-73-SiO:KMnNaZn'	K(KNa_0.5◻_0.5)(Mn_1.5Na_0.5)Zn₃[Si₁₂O₃₀]	Hex.
9.CM.05	Eifelite	KNa₂(MgNa)Mg₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Almarudite	K◻₂Mn²⁺₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05	Armenite	Ba(H₂O)₂Ca₂Al₃[Al₃Si₉O₃₀]	Orth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05	Merrihueite	K(◻Na)Fe²⁺₂Fe²⁺₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Oftedalite	K◻₂(ScCa)Be₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Roedderite	K(◻Na)Mg₂Mg₃[Si₁₂O₃₀]	Hex. 6 m2 : P6₂c
9.CM.05	Shibkovite	K(◻K)Ca₂Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Sogdianite	K◻₂Zr₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Berezanskite	K◻₂Ti₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Poudretteite	K◻₂Na₂B₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Darapiosite	KNa₂Mn₂(Zn₂Li)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Chayesite	K◻₂Mg₂(Mg₂Fe³⁺)[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Osumilite-(Mg)	K◻₂Mg₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Osumilite	K◻₂Fe²⁺₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Sugilite	KNa₂Fe³⁺₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Trattnerite	◻(◻)₂Fe³⁺₂Mg₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Brannockite	K◻₂Sn₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Klöchite	K◻₂(Fe²⁺Fe³⁺)Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
9.CM.05	Dusmatovite	K(K◻)Mn²⁺₂Zn₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05	Yagiite	Na◻₂Mg₂Al₃[Al₂Si₁₀O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.9.CM.	Aluminosugilite	KNa₂Al₂Li₃[Si₁₂O₃₀]	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10	Faizievite	K₂Na(Ca₆Na)Ti₄Li₆[Si₆O₁₈]₂[Si₁₂O₃₀]F₂	Tric. 1 : P1

RadioactivityHide

Other InformationHide

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 PlechoviteHide

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https://www.mindat.org/min-499620.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Mineral Dealers:

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References for PlechoviteHide

Reference List:

Localities for PlechoviteHide

Showing 1 localities.

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.

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Locality ListHide

- 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.

Poland (TL)

Lower Silesian Voivodeship

Wrocław County

Gmina Jordanów Śląski

ⓘ Jordanów granite quarry (TL)

Pieczka et al. (2026)

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