https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
'._('einklappen').'
 

Rickardite

Pictures (2 Images total)

Rickardit
Views (File:
1585582455
): 262
Rickardit
metallische, leicht violette Kristalle von Rickardit, North Star Mine, Mammoth, Tintic District, Juab County, Utah, USA; BB < 1 mm, analysiert mittels REM-EDX
Copyright: Joy Desor; Contribution: openpit
Location: USA/Utah/Juab Co./Tintic District/Mammoth/North Star Mine
Mineral: Rickardite
Image: 1585582455
License: Usage for Mineralienatlas project only
Rickardit  E
Analysed with energy dispersive X-ray spectroscopy EDX

metallische, leicht violette Kristalle von Rickardit, North Star Mine, Mammoth, Tintic District, Juab County, Utah, USA; BB < 1 mm, analysiert mittels REM-EDX
Copyright: Joy Desor
Contribution: openpit 2020-03-30
Locality: North Star Mine / Mammoth / Tintic District / Juab Co. / Utah / USA
Rickardit
Views (File:
1647423119
): 124
Rickardit
North Star mine, Mammoth, Utah; Bb 4 mm; Begleiter: Quetzalcoatlit, Leisingit, Zemannit.
Copyright: Guy Heinen; Contribution: guyhein
Collection: Guy Heinen
Location: USA/Utah/Juab Co./Tintic District/Mammoth/North Star Mine
Mineral: Leisingite, Quetzalcoatlite, Rickardite, Zemannite
Image: 1647423119
License: Usage for Mineralienatlas project only
Rickardit

North Star mine, Mammoth, Utah; Bb 4 mm; Begleiter: Quetzalcoatlit, Leisingit, Zemannit.
Collection: Guy Heinen
Copyright: Guy Heinen
Contribution: guyhein 2022-03-16
Locality: North Star Mine / Mammoth / Tintic District / Juab Co. / Utah / USA

Collectors Summary

Color violett, purpurrot
Streak color schwarz
Lustre Metallglanz
Hardness (Mohs) 3.5
Solubility +++ HNO3
Crystal System orthorhombisch, Pmmn

Chemism

Chemical formula

Cu3-xTe2

Empirical formula (analysis)

Cu2.82Te2.04

Chemical composition

Kupfer, Tellur

Unit weight: 439.510686 u; Number of atoms in the formula: 4.86

Info

Empirical formula:

Cu2.82Te2.04

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Copper

Cu

40.77

2.82

58.02

63.5463000

179.2005660
Tellurium

Te

59.23

2.04

41.98

127.6030000

260.3101200

Analysis wt%

Cu : 40.74, Te : 59.21 (Ref: Dana, 7th ed. 1)

Strunz 9th edition incl. updates

2.BA.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
A: mit Kupfer (Cu), Silber (Ag), Gold (Au)
30:Rickardit-Gruppe

Lapis Classification

II/B.04-020

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
B: Sulfide, Selenide und Telluride mit Verhältnis Metall : S,Se,Te > 1:1
4: Selenide mit Kupfer vorherrschend

Classification by Hölzel

2.BA.260

2: SULFIDES
B: Sulfides (etc) with Me/S > 1/1 (mostly 2/1)
A: With Cu,Ag,Au
2: Berzelianite-Weissit-Group

Dana 8th edition

02.16.15.01

02: Sulfide Minerals
16: Sulfides - Including Selenides and Tellurides with miscellaneous formulae

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

violett, purpurrot

Streak color

schwarz

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

strak, karmesinrot zu violettgrau

Anisotropism

stark, außergewöhnlich in furigen Orangetönen

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 28.30, 37.20, 32.75
(420) 26.10, 35.50, 30.80
(440) 23.50, 33.20, 28.35
(460) 20.80, 30.50, 25.65
(480) 17.80, 27.50, 22.65
(500) 15.10, 24.80, 19.95
(520) 12.80, 22.30, 17.55
(540) 11.50, 20.30, 15.90
(560) 11.80, 18.90, 15.35
(580) 14.50, 18.20, 16.35
(600) 19.60, 18.40, 19.00
(620) 26.00, 19.40, 22.70
(640) 32.70, 21.00, 26.85
(660) 38.60, 23.30, 30.95
(680) 43.90, 26.00, 34.95
(700) 48.10, 28.60, 38.35
Reflection chart Rickardite

Reflectivity Ø

24.88

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

59

Space Group

Pmmn

Cell parameters a (Å)

3.98

Cell parameters b (Å)

3.98

Cell parameters c (Å)

6.12

Cell parameters a/b or c/a

1

Cell parameters c/b

1.538

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volumne (ų)

96.943

X-Ray Powder Diffraction

6.12(50),
3.348(90),
3.336(100),
3.058(80),
2.562(60),
2.073(100),
2.038(80),
1.989(40)
XRD chart Rickardite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

79 (50g)

Density (g/cm³)

7.54

7.528 ( ρ calc. Mineralienatlas )

Tenacity

spröde

Instability

+++ HNO3

(Co-)Type locality

(Co-)Type locality

USA/Colorado/Gunnison Co./Vulcan District/Good Hope Mine

Type material

National Museum of Natural History, Washington, D.C., USA

Collection number of type material

114590

Preface

Occurrences

In tellurreichen, subvulkanischen Erzgängen.

Rareness

sehr selten

Name from

Thomas Arthur Rickard (1864–1953), Mineningenieur und Editor des Engineering and Mining Journal, New York and London.

Author (Name, Year)

Ford, 1903

References

Acta Crystallographica B49 (1993), 398

American Journal of Science 15 (1903), 69

American Mineralogist 34 (1949), 441

Mineralogical Journal (Japan) 7 (1973), 252.

Other languages

German

Rickardit

Spanish

Rickardita

French

Rickardite

English

Rickardite

Russian

Рикардит

Simplified Chinese

碲铜矿

Japanese

ﾘｶﾙﾄﾞ鉱

Alternative Name

Simplified Chinese

铜碲矿

CNMNC symbol

Symbol

Rkd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) DKlSWfqNgEOeIJrOubRMEg
GUID (Global unique identifier) 5952A90C-8DFA-4380-9E20-9ACEB9B44C12
Database ID 3274