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Marécottite

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Views (Image: 1388502340): 2149, Rating: 8.71

Marécottite

Fundort: Einigkeit (Svornost), Jáchymov (St. Joachimsthal), Erzgebirge, Karlsbad, Tschechien. FOV 2,5 mm.

Pavel Škácha, Czechmin

Contribution: Stefan 2013-12-31

Locality: Einigkeit (Svornost) / St. Joachimsthal (Jáchymov) / Karlsbad (Karlovy Vary), Bezirk / Karlsbad, Region (Karlovarsky kraj) / Tschechien

Views (Image: 1444306957): 461

Marécottit

Bildbreite: 2,7 mm, Fundort: Werner Mine (Rovnost), St. Joachimsthal (Jáchymov), Region Karlsbad (Karlovarsky kraj), Tschechien

Jason B. Smith

Contribution: thdun5 2015-10-08

Locality: Werner Mine (Rovnost) / St. Joachimsthal (Jáchymov) / Karlsbad (Karlovy Vary), Bezirk / Karlsbad, Region (Karlovarsky kraj) / Tschechien

Views (Image: 1444414999): 542

Marécottit

Bildbreite: 3 mm, Fundort: St. Joachimsthal (Jáchymov), Region Karlsbad (Karlovarsky kraj), Tschechien

Leonardus

Contribution: thdun5 2015-10-09

Locality: St. Joachimsthal (Jáchymov) / Karlsbad (Karlovy Vary), Bezirk / Karlsbad, Region (Karlovarsky kraj) / Tschechien

Views (Image: 1444415082): 520

Marécottit

Bildbreite: 3 mm, Fundort: St. Joachimsthal (Jáchymov), Region Karlsbad (Karlovarsky kraj), Tschechien

Luigi Chiappino

Contribution: thdun5 2015-10-09

Locality: St. Joachimsthal (Jáchymov) / Karlsbad (Karlovy Vary), Bezirk / Karlsbad, Region (Karlovarsky kraj) / Tschechien

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Collectors Summary

Color

orangegelb, rötlichgelb

Streak color

weiß

Hardness (Mohs)

Cleavages

vollkommen {011}

Crystal System

triklin, P1

Chemism

Chemical formula

Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈

Empirical formula (analysis)

[(Na_0.05K_0.07)_Σ0.12 (Mg_1.83Zn_0.41Mn_0.41Cu_0.15Ni_0.08)_Σ2.88 Al_0.07]_Σ3.07 (UO₂)₈[(SO₄)_3.77(SiO₄)0.21]_Σ3.98 O₆(OH)_1.84·28H₂O

Chemical composition

Magnesium, Sauerstoff, Schwefel, Uran, Wasserstoff

Unit weight: 3360.006209823 u; Number of atoms in the formula: 144.6

Info

Empirical formula:

[(Na_0.05K_0.07)(Mg_1.83Zn_0.41Mn_0.41Cu_0.15Ni_0.08)Al_0.07](UO₂)₈[(SO₄)_3.77(SiO₄)0.21]O₆(OH)_1.84·28H₂O

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Hydrogen	H	1.74	57.84	40.00	1.0079470	58.2996545
Oxygen	O	33.77	70.92	49.05	15.9994300	1,134.6795756
Sodium	Na	0.03	0.05	0.03	22.9897702	1.1494885
Magnesium	Mg	1.32	1.83	1.27	24.3050600	44.4782598
Aluminium	Al	0.06	0.07	0.05	26.9815382	1.8887077
Silicon	Si	0.84	1	0.69	28.0855300	28.0855300
Sulfur	S	3.60	3.77	2.61	32.0655000	120.8869350
Potassium	K	0.08	0.07	0.05	39.0983100	2.7368817
Manganese	Mn	0.67	0.41	0.28	54.9380499	22.5246005
Nickel	Ni	0.14	0.08	0.06	58.6934200	4.6954736
Copper	Cu	0.28	0.15	0.10	63.5463000	9.5319450
Zinc	Zn	0.80	0.41	0.28	65.4094000	26.8178540
Uranium	U	56.67	8	5.53	238.0289130	1,904.2313040

Search for minerals with similar chemistry

Strunz 9th edition incl. updates

7.EC.15

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
E: Uranylsulfate
C: Mit mittelgroßen und großen [Kationen]
15:

Lapis Classification

VI/D.20-080

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
D: Wasserhaltige Sulfate, mit fremden Anionen
20: Uranylsulfate [UO2] 2+ – [SO4] 2-

Classification by Hölzel

7.ED.200

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
E: Uranyl-Sulfates
D: Uranyl-Sulfates (+Anions +Water)

Dana 8th edition

31.10.04.07

31: Hydrated Sulfates Containing Hydroxyl or Halogen
10: Hydrated Sulfates Containing Hydroxyl or Halogen miscellaneous
04: Zippeite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

Zippeite group

Optical Properties

Color	orangegelb, rötlichgelb
Streak color	weiß
RI value α / ω / n	1.735
RI value γ / ε	1.750
Ri mean	1.743
2V angle	Biaxial

Crystallography

Crystal System	triklin
Class (H-M)	1
Space Group number	2
Space Group	P1
Cell parameters a (Å)	10.8084(2)
Cell parameters b (Å)	11.2519(3)
Cell parameters c (Å)	13.8465(3)
Cell parameters a/b or c/a	0.961
Cell parameters c/b	1.231
Cell parameters α	66.222(2)°
Cell parameters β	72.424(2)°
Cell parameters γ	70.014(2)°
Z	1
Volumne (Å³)	1421.566
Kristall structure	Mg-dominates Mitglied der Zippeit-Gruppe
X-Ray Powder Diffraction	9.46(100), 8.63(20), 6.46(20), 6.33(20), 4.73(80), 3.44(80), 3.39(70), 2.88(30)
	Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

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Crystal Structure 3D

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Physical Properties

Hardness (Mohs)	3
VHN (Hardness Vickers)	83 (ungefähre Angabe abgeleitet aus der Mohshärte)
Density (g/cm³)	3.83 (berechnet) 4.03 (gemessen)
	3.925 ( ρ calc. Mineralienatlas )
Cleavages	vollkommen {011}
Tenacity	sehr spröde

(Co-)Type locality

(Co-)Type locality	Schweiz /Wallis, Kanton /Saint-Maurice, Bezirk /Salvan /La Creusaz /Uranprospekt
Type material	Musée Géologique Cantonal at Lausanne, Schweiz

Preface

Name from	Für das Dorf Les Marécottes, dessen Kirche ca. 1100 Meter von der Typuslokalität entfernt ist.
Author (Name, Year)	Brugger & Burns & Meisser, 2003

References

American Mineralogist 88 (2003), 676

Plášil, J.; Škoda, R. - New crystal-chemical data for marécottite - Mineralogical Magazine 30. Juli 2015 (online)

IMA group assignments

Zippeite group

Cobaltzippeite

Co(UO₂)₂(SO₄)O₂·3.5H₂O

monoklin

C2/m

Magnesiozippeite

Mg(UO₂)₂(SO₄)O₂·3.5H₂O

monoklin

C2/m

Marécottite

Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈

triklin

Natrozippeite

Na₅(UO₂)₈(SO₄)₄O₅(OH)₃·12H₂O

monoklin

P2₁/n

Nickelzippeite

Ni₂(UO₂)₆(SO₄)₃(OH)₁₀·16H₂O

monoklin

C2/m

Plavnoite

K_0.8Mn_0.6[(UO₂)₂O₂(SO₄)]·3.5H₂O

monoklin

C2/c

Pseudojohannite

Cu_6.5(UO₂)₈O₈(SO₄)₄(OH)₅·25H₂O

triklin

Rabejacite

Ca_2[(UO₂)₄O₄(SO₄)₂](H₂O)₈

triklin

Sejkoraite-(Y)

Y₂(UO₂)₈O₆(SO₄)₄(OH)₂·26H₂O

triklin

Zinczippeite

Zn(UO₂)₂(SO₄)O₂·3.5H₂O

monoklin

C2/m

Zippeite

K₃(UO₂)₄(SO₄)₂O₃(OH)·3H₂O

monoklin

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Actuality: 26. Feb 2021 - 13:32:16

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Sejkoraite-(Y)	Y₂(UO₂)₈O₆(SO₄)₄(OH)₂·26H₂O triklin : 1 : P1	7.EC.15
Marécottite	Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈ triklin : 1 : P1	7.EC.15

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Jáchymovite	(UO₂)₈(OH)₁₄(SO₄)·13H₂O monoklin : 2, 2/m : P2₁, P2₁/m	VI/D.20-005
Uranopilite	(UO₂)₆SO₄O₂(OH)₆·14H₂O triklin : 1 : P1	VI/D.20-010
Metauranopilite	(UO₂)₆SO₄(OH)₁₀·5H₂O	VI/D.20-020
Mathesiusite	K₅(UO₂)₄(SO₄)₄(VO₅)·4H₂O tetragonal : 4/m : P4/n	VI/D.20-024
Adolfpateraite	K(UO₂)(SO₄)(OH)(H₂O) monoklin : 2/m : P2₁/c	VI/D.20-025
Natrozippeite	Na₅(UO₂)₈(SO₄)₄O₅(OH)₃·12H₂O monoklin : 2/m : P2₁/n	VI/D.20-030
Zippeite	K₃(UO₂)₄(SO₄)₂O₃(OH)·3H₂O monoklin : 2 : C2	VI/D.20-040
Nickelzippeite	Ni₂(UO₂)₆(SO₄)₃(OH)₁₀·16H₂O monoklin : 2/m : C2/m	VI/D.20-050
Cobaltzippeite	Co(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	VI/D.20-060
Zinczippeite	Zn(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	VI/D.20-070
Magnesiozippeite	Mg(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	VI/D.20-075
Marécottite	Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈ triklin : 1 : P1	VI/D.20-080
Sejkoraite-(Y)	Y₂(UO₂)₈O₆(SO₄)₄(OH)₂·26H₂O triklin : 1 : P1	VI/D.20-085
Rabejacite	Ca_2[(UO₂)₄O₄(SO₄)₂](H₂O)₈ triklin : 1 : P1	VI/D.20-090

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Marécottite

Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈

triklin : 1 : P1

7.ED.200

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Ettringite	Ca₆Al₂(SO₄)₃(OH)₁₂·26H₂O trigonal : 3m : P31c	31.10.02.01
Bentorite	Ca₆(Cr,Al)₂(SO₄)₃(OH)₁₂·26 H₂O hexagonal	31.10.02.02
Buryatite	Ca₃(Si,Fe³⁺,Al)(SO₄)B(OH)₄(OH,O)₆·12H₂O trigonal : 3m : P31c	31.10.02.03
Zaherite	Al₁₂(SO₄)₅(OH)₂₆·20H₂O triklin : 1, 1 : P1, P1	31.10.03.01
Zippeite	K₃(UO₂)₄(SO₄)₂O₃(OH)·3H₂O monoklin : 2 : C2	31.10.04.01
Natrozippeite	Na₅(UO₂)₈(SO₄)₄O₅(OH)₃·12H₂O monoklin : 2/m : P2₁/n	31.10.04.02
Magnesiozippeite	Mg(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	31.10.04.03
Nickelzippeite	Ni₂(UO₂)₆(SO₄)₃(OH)₁₀·16H₂O monoklin : 2/m : C2/m	31.10.04.04
Zinczippeite	Zn(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	31.10.04.05
Cobaltzippeite	Co(UO₂)₂(SO₄)O₂·3.5H₂O monoklin : 2/m : C2/m	31.10.04.06
Marécottite	Mg₃[(UO₂)₄O₃(OH)(SO₄)₂]₂(H₂O)₂₈ triklin : 1 : P1	31.10.04.07
Copiapite	Fe²⁺Fe₄³⁺(SO₄)₆(OH)₂·20H₂O triklin : 1 : P1	31.10.05.01
Magnesiocopiapite	MgFe₄³⁺(SO₄)₆(OH)₂·20H₂O triklin : 1 : P1	31.10.05.02
Cuprocopiapite	CuFe₄³⁺(SO₄)₆(OH)₂·20H₂O triklin : 1 : P1	31.10.05.03
Ferricopiapite	Fe_2-3³⁺Fe₄³⁺(SO₄)₆(OH)₂·20H₂O triklin : 1 : P1	31.10.05.04
Calciocopiapite	CaFe₄³⁺(SO₄)₆(OH)₂·19 H₂O triklin : 1 : P1	31.10.05.05
Zincocopiapite	ZnFe₄³⁺(SO₄)₆(OH)₂·18H₂O triklin : 1 : P1	31.10.05.06
Aluminocopiapite	(Al,Mg)Fe³⁺₄(SO₄)₆(OH,O)₂·20H₂O triklin : 1 : P1	31.10.05.07
Clairite	(NH₄)₂(Fe³⁺,Mn³⁺)₃(SO₄)₄(OH)₃·3H₂O triklin	31.10.08.01
Caminite	Mg_1.4(SO₄)(OH)_0.8·0.2H₂O tetragonal : 4/mmm : I4₁/amd	31.10.09.01

Other languages

German	Marécottit
Spanish	Marécottita
English	Marécottite
French	Marécottite
Russian	Марекоттит

IMA Number

IMA 2001-056

Automatic Links to external internet sources (Responsibility is with the operator)

German pages	DeWikiPedia - search for: Marécottit Google-Bilder-Suche - search for: Marécottit Mineralogisch-Petrographisches-Institut Hamburg - search for: Marécottit
English pages	Mindat - search for: Marécottite Webmineral - search for:Marécottite Handbook-of-Mineralogy - search for: Marécottite RRUFF - Raman, XRD and other mineral data - search for: Marécottite RRUFF - References and PDF downloads - search for: Marécottite American-Mineralogist-Crystal-Structure-Database - search for: Marécottite Athena - search for: Marécottite
Russian pages	Webmineral.ru - search for: Марекоттит

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German pages

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