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Eckhardite

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Eckhardit und Housleyit
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Eckhardit und Housleyit

grünblaue, nadelige Gruppen von Eckhardit neben bläulichen, traubigen Aggregaten von Hausleyit und hellbraunen Kristallen von Markcooperit (?, unsicher, visuell bestimmt), Bird Nest Drift, Otto Mou...

Copyright: Joy Desor
Contribution: openpit 2020-02-07
Locality: Bird Nest drift / Otto Mountain / Baker / San Bernardino Co. / Kalifornien (California) / USA

Collectors Summary

Color hell blaugrün
Streak color sehr blass blaugrün
Lustre Glasglanz, Subdiamantglanz
Hardness (Mohs) 2 - 3
Cleavages möglich {101} (noch nicht beobachtet)
Fracture unregelmäßig
Crystal System monoklin, P21/n

Chemism

Chem­ical formula

(Ca,Pb)Cu2+Te6+O5(H2O)

Empir­ical formula (anal­y­sis)

Ca0.962Pb0.073Cu2+0.971Mg0.005Fe3+0.002Te6+0.986O6H2.052

Addi­tional chem. informa­tion

Blei-Tellur Oxysalz

Chem­ical com­po­si­tion

Blei, Calcium, Kupfer, Tellur, Sauerstoff, Wasserstoff

Unit weight: 339.499869044 u; Number of atoms in the formula: 11.051

Info

Empirical formula:

Ca0.962Pb0.073Cu0.971Mg0.005Fe0.002Te0.986O6H2.052

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.61

2.05

18.57

1.0079470

2.0683072

Oxygen

O

28.28

6

54.29

15.9994300

95.9965800

Magnesium

Mg

0.04

0.01

0.05

24.3050600

0.1215253

Calcium

Ca

11.36

0.96

8.71

40.0784000

38.5554208

Iron

Fe

0.03

0

0.02

55.8452000

0.1116904

Copper

Cu

18.17

0.97

8.79

63.5463000

61.7034573

Tellurium

Te

37.06

0.99

8.92

127.6030000

125.8165580

Lead

Pb

4.46

0.07

0.66

207.2100000

15.1263300

Anal­y­sis wt%

PbO : 4.5, CaO : 15.09, MgO : 0.06, CuO : 21.59, Fe2O3 : 0.05, TeO3: 48.43, H2O* : 5.17, Total : 94.93; EDX (Kampf et al. 2013); *berechnet

Strunz 9th edi­tion incl. updates

7.CC.

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
C: Mit mittelgroßen und großen [Kationen]

IMA sta­tus

anerkannt - CNMNC Newsletter No. 16, August 2013

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

hell blaugrün

Streak color

sehr blass blaugrün

Lus­tre

Glasglanz, Subdiamantglanz

RI value α / ω / n

1.770

RI value β

1.860

RI value γ / ε

1.895

Ri mean

1.842

2V angle

Biaxial (-) 61.2 (gemessen)

Ori­enta­tion

Z = b, X ≈ [101]

Dis­per­sion

erkennbar, r < v

Pleochro­ism

Z = hell grünblau < Y sehr blass blaugrün < X farblos

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell param­e­ters a (Å)

8.1606

Cell param­e­ters b (Å)

5.3076

Cell param­e­ters c (Å)

11.4412

Cell param­e­ters a/b or c/a

1.538

Cell param­e­ters c/b

2.156

Cell param­e­ters α

90°

Cell param­e­ters β

101.549°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

485.522

Kristall struc­ture

Neuer Strukturtyp, Struktur bestimmt

X-Ray Pow­der Diffrac­tion

5.94(100), 3.287(80), 2.645(89), 2.485(48), 2.245(46), 1.809(40), 1.552(42), 1.530(43)

XRD chart Eckhardite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2 - 3

Density (g/cm³)

4.644

4.644 ( ρ calc. Mineralienatlas )

Cleav­ages

möglich {101} (noch nicht beobachtet)

Frac­ture

unregelmäßig

Tenac­ity

spröde

Radioac­tiv­ity

keine

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/San Bernardino Co./Baker/Otto Mountain/Aga Mine

USA/Kalifornien (California)/San Bernardino Co./Baker/Otto Mountain/Bird Nest drift

Type mate­r­ial

Mineral Sciences Department, Natural History Museum of Los Angeles County, Los Angeles, California, USA

Col­lec­tion number of type mate­r­ial

62512 und 64011

Preface

Name from

Eckhard D. Stuart (* 1939), Bereitsteller von Analysenmaterial

Author (Name, Year)

Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, George R. Rossman, Joseph Marty and Brent Thorne (2013)

References

Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J. and Thorne, B. - Eckhardite, IMA 2012-085. CNMNC Newsletter No. 16, August 2013, page 2696; Mineralogical Magazine 77 (2013), 2695-2709.

Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J. and Thorne, B. - Lead-tellurium oxysalts from Otto Mountain near Baker, California: XI. Eckhardite, (Ca,Pb)Cu2+Te6+O5(H2O), a new mineral with HCP stair-step layers. In: American Mineralogist 98 (2013), 1617-1623

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

Karpovite

Tl2VO(SO4)2(H2O)

monoklin : 2 : P21

7.CC.

Eckhardite

(Ca,Pb)Cu2+Te6+O5(H2O)

monoklin : 2/m : P21/n

7.CC.

Evdokimovite

Tl4(VO)3(SO4)5(H2O)5

monoklin : 2/m : P21/n

7.CC.

Andychristyite

PbCu2+Te6+O5(H2O)

triklin : 1 : P1

7.CC.

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

7.CC.05

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

7.CC.10

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.10

Kalinite

KAl(SO4)2·11 H2O

monoklin : 2/m : C2/c

7.CC.15

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

7.CC.15

Alum-(K)

KAl(SO4)2·12H2O

kubisch : m3 : Pa3

7.CC.20

Lonecreekite

(NH4)(Fe3+,Al)(SO4)2·12H2O

kubisch : m3 : Pa3

7.CC.20

Tschermigite

(NH4)Al(SO4)2·12H2O

kubisch : m3 : Pa3

7.CC.20

Lanmuchangite

TlAl[SO4]2·12H2O

kubisch : m3 : Pa3

7.CC.20

Alum-(Na)

NaAl(SO4)2·12H2O

kubisch : m3 : Pa3

7.CC.20

Voltaite

K2Fe2+5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Pertlikite

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

tetragonal : 4mm : I41cd

7.CC.25

Ammoniomagnesiovoltaite

(NH4)2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Zincovoltaite

K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Ammoniovoltaite

(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18

kubisch : m3m : Fd3c

7.CC.25

Magnesiovoltaite

K2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Kröhnkite

Na2Cu(SO4)2· 2H2O

monoklin : 2/m : P21/c

7.CC.30

Ferrinatrite

Na3Fe(SO4)3·3H2O

trigonal : 3 : P3

7.CC.35

Goldichite

KFe3+(SO4)2·4H2O

monoklin : 2/m : P21/c

7.CC.40

Löweite

Na12Mg7(SO4)13·15H2O

trigonal : 3 : R3

7.CC.45

Blödite

Na2Mg(SO4)2·4H2O

monoklin : 2/m : P21/a

7.CC.50

Changoite

Na2Zn[SO4]2·4H2O

monoklin : 2/m : P21/a

7.CC.50

Nickelblödite

Na2(Ni,Mg)(SO4)2·4H2O

monoklin : 2/m : P21/a

7.CC.50

Cobaltoblödite

Na2Co(SO4)2·4H2O

monoklin : 2/m : P21/a

7.CC.50

Manganoblödite

Na2Mn(SO4)2·4H2O

monoklin : 2/m : P21/a

7.CC.50

Leonite

K2Mg(SO4)2·4H2O

monoklin : 2/m : C2/m

7.CC.55

Mereiterite

K2Fe2+[SO4]2·4H2O

monoklin : 2/m : C2/m

7.CC.55

Mohrite

(NH4)2Fe2+(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.60

Konyaite

Na2Mg(SO4)2·5H2O

monoklin : 2/m : P21/c

7.CC.60

Picromerite

K2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.60

Cyanochroite

K2Cu(SO4)·6H2O

monoklin : 2/m : P21/c

7.CC.60

Boussingaultite

(NH4)2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.60

Katerinopoulosite

(NH4)2Zn(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.60

Nickelpicromerite

K2Ni(SO4)2·6H2O

monoklin : 2/m : P21/c

7.CC.60

'Nickelboussingaultite'

(NH4)2(Ni,Mg)(SO4)2·6H2O

7.CC.60

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

7.CC.65

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

7.CC.70

Other languages

German

Eckhardit

English

Eckhardite

Russian

Экхардит

IMA Number

IMA 2012-085

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

German pages

DeWikiPedia - search for: Eckhardit
Google-Bilder-Suche - search for: Eckhardit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Eckhardit

English pages

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

Russian pages

Webmineral.ru - search for: Экхардит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Eckhardit
Crystal-Treasure.com - search for: Eckhardit
Bosse - search for: Eckhardit

Locations with GPS information