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Utahite

Pictures (7 Images total)

Utahit
Views (Image: 1354564524): 775
Utahit (SNr: A026355)

Tafelige strahlige blaue Kristalle von der Typlokalität mit Cornwallit und Malachit, BB = <1 mm, Fundort: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2012-12-03
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA
Utahit
Views (Image: 1364919986): 516
Utahit (SNr: B004086)

Spießige blaue Kristalleauf Malachit und Quarz, BB = 3,8 mm; Fundort: Centennal Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2013-04-02
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA
Utahit
Views (Image: 1363020531): 568
Utahit (SNr: A005664)

Tafelige mattblaue Kristalle mit Malachit, BB = 1 mm, Fundort: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2013-03-11
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA
Utahit
Views (Image: 1371828239): 589
Utahit (SNr: A029817)

Langtafelige blaugrüne Kristallbüschel mit Malachit und Quarz, BB = 2,8 mm; Fundort: Centennal Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2013-06-21
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA
Utahit
Views (Image: 1295972264): 753
Utahit (SNr: A004896)

Blaue meißelförmige Kristalle von der Typlokalität; BB: 1,2 mm. Fundort: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2011-01-25
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA
Utahit
Views (Image: 1363020671): 273
Utahit (SNr: A005664)

Tafelige mattblaue Kristalle mit Malachit, BB = 1,7 mm, Fundort: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2013-03-11
Locality: Centennial Eureka Mine / Eureka / Tintic District / Juab Co. / Utah / USA

Collectors Summary

Color blass braun mit grün internen Reflektionen
Streak color blass blau
Hardness (Mohs) 4 - 5
Cleavages keine beobachtet
Fracture uneben für Einkristalle, Cluster neigen zum Bruch parallel zur Dehnung von Individuen, makroskopisch wurde weder Spaltung noch Bankungsfuge beobachtet
Crystal System triklin, P1

Chemism

Chem­ical formula

MgCu2+4Zn2Te6+3O14(OH)4∙6H2O

Chem­ical com­po­si­tion

Kupfer, Magnesium, Tellur, Zink, Sauerstoff, Wasserstoff

Unit weight: 1102.154912 u; Number of atoms in the formula: 35

Info

Empirical formula:

MgCu4Zn2Te3O14(OH)4∙6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.55

6

17.14

1.0079470

6.0476820
Oxygen

O

27.58

19

54.29

15.9994300

303.9891700
Magnesium

Mg

2.21

1

2.86

24.3050600

24.3050600
Copper

Cu

23.06

4

11.43

63.5463000

254.1852000
Zinc

Zn

11.87

2

5.71

65.4094000

130.8188000
Tellurium

Te

34.73

3

8.57

127.6030000

382.8090000

Strunz 9th edi­tion incl. updates

7.DE.25

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
D: Sulfate (Selenate, etc.) mit weitere Anionen, mit H2O
E: mit mittelgroßen Kationen; unklassifiziert
25:Utahit-Gruppe

Lapis Clas­sifica­tion

IV/K.15-019

IV: OXIDE
K: Sulfite, Selenite, Tellurite
15: Tellurate mit [Te6+O6] 6--Gruppen und verwandte Strukturen

Clas­sifica­tion by Hölzel

7.KD.100

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
K: Tellurates
D: Tellurates (+Anions +Water)

Dana 8th edi­tion

33.02.08.01

33: Selenates and Tellurates
02: Selenates and Tellurates as A+ (B++)m XO6 Zq · x(H2O) where x can equal 0

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

blass braun mit grün internen Reflektionen

Streak color

blass blau

Diaphane­ity (Trans­parency)

durchscheinend

RI value α / ω / n

1.84

RI value γ / ε

1.90

Ri mean

1.87~

2V angle

b ?

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell param­e­ters a (Å)

5.6831(4)

Cell param­e­ters b (Å)

8.7793(6)

Cell param­e­ters c (Å)

9.9818(9)

Cell param­e­ters a/b or c/a

0.647

Cell param­e­ters c/b

1.137

Cell param­e­ters α

95.415(7)

Cell param­e­ters β

104.129(7)

Cell param­e­ters γ

90.098(6)

Z

1

Volumne (ų)

480.649

Kristall struc­ture

fehlte in der Erstbeschreibung. Im Zuge der Neudefinition aufgeklärt, siehe Owen P. Missen, Stuart J. Mills, Michael S. Rumsey, Malcolm E. Back, Veronica E. Di Cecco, William D. Birch, John Spratt: The crystal structure and redefinition of utahite. Mineralogy and Petrology Volume 115, Issue 4 (2021) S. 477–486.

X-Ray Pow­der Diffrac­tion

9.64(100),
8.74(50),
6.86(40),
6.17(40),
4.841(100),
3.822(40),
2.747(60),
2.600(40)
XRD chart Utahite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4 - 5

VHN (Hard­ness Vick­ers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.33

3.807 ( ρ calc. Mineralienatlas )

Cleav­ages

keine beobachtet

Frac­ture

uneben für Einkristalle, Cluster neigen zum Bruch parallel zur Dehnung von Individuen, makroskopisch wurde weder Spaltung noch Bankungsfuge beobachtet

Tenac­ity

spröde

Chem­ical Prop­er­ties and Tests

Raman-Spektrum ist veröffentlicht, Owen P. Missen, Stuart J. Mills, Michael S. Rumsey, Malcolm E. Back, Veronica E. Di Cecco, William D. Birch, John Spratt: The crystal structure and redefinition of utahite. Mineralogy and Petrology Volume 115, Issue 4 (2021) S. 477–486.

(Co-)Type locality

(Co-)Type locality

USA/Utah/Juab Co./Tintic District/Eureka/Centennial Eureka Mine

Preface

Author (Name, Year)

Roberts & Stirling & Criddle & Jensen & Moffatt & Wilson, 1997

References

Mineralogical Record 28 (1997), 175

IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 56 - Nomenclature/classification proposals approved in July 2020

Owen P. Missen, Stuart J. Mills, Michael S. Rumsey, Malcolm E. Back, Veronica E. Di Cecco, William D. Birch, John Spratt: The crystal structure and redefinition of utahite. Mineralogy and Petrology Volume 115, Issue 4 (2021) S. 477–486.

Other languages

German

Utahit

Spanish

Utahita

English

Utahite

French

Utahite

CNMNC (IMA)-Number

IMA 1995-039

CNMNC symbol

Symbol

Uta

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

German pages

 DeWikiPedia - search for: Utahit
Google-Bilder-Suche - search for: Utahit
Mineralienatlas.de (Forum) - search for: Utahit

English pages

 Mindat - search for: Utahite
Webmineral - search for:Utahite
Handbook-of-Mineralogy - search for: Utahite
RRUFF - Raman, XRD and other mineral data - search for: Utahite
RRUFF - References and PDF downloads - search for: Utahite
American-Mineralogist-Crystal-Structure-Database - search for: Utahite
Strahlen.org - search for: Utahite

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Utahit
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Edelsteine Neuburg - Gundolf Fischer - search for: Utahit

Locations with GPS information