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Gerhardtite (Gerhardtit)

Pictures (15 Images total)

Gerhardtit
Views (Image: 1282897912): 3328, Rating: 9
Gerhardtit

Bildbreite: 2,5 mm; Fundort: Cerro Minado, Huercal-Overa, Almería (Almeria), Andalusien (Andalucía), Spanien

Copyright: Jean-Marc Johannet
Contribution: Hg 2010-08-27
Locality: Cerro Minado (Mina Cuesta Alta) / Huercal-Overa / Almería, Provinz / Andalusien (Andalucía) / Spanien
Gerhardtite on Betekhtinite, with Galena and Calcite
Views (Image: 1595141474): 301
Gerhardtite on Betekhtinite, with Galena and Calcite

Very interesting and quite rare combo specimen, where we can see association of bluish-green Gerhardtite on dark gray, acicular Betekhtinite, with few large Galena crystals and brownish Calcite cry...

Copyright: pegmatite
Contribution: pegmatite 2020-07-19
Locality: Dzhezkazgan Mine / Dzhezkazgan (Dscheskasgan) / Qaraghandy oblysy (Karaganda) / Kasachstan
Gerhardtit
Views (Image: 1282726125): 2918, Rating: 7.83
Gerhardtit

Bildbreite: 2,5 mm; Fundort: Cerro Minado, Huercal-Overa, Almería (Almeria), Andalusien (Andalucía), Spanien

Copyright: Jean-Marc Johannet
Contribution: Hg 2010-08-25
Locality: Cerro Minado (Mina Cuesta Alta) / Huercal-Overa / Almería, Provinz / Andalusien (Andalucía) / Spanien
Likasit, Gerhardtit
Views (Image: 1157025778): 2629, Rating: 7.6
Likasit, Gerhardtit

dunkelblauer Likasit auf grünlichblauem Gerhardtit; Größe: 10 x 6.5 x 4 cm; Fundort: Dzhezkazgan Mine, Karaganda Oblast, Kasachstan

Copyright: Rob Lavinsky
Contribution: slugslayer 2006-08-31
Locality: Dzhezkazgan Mine / Dzhezkazgan (Dscheskasgan) / Qaraghandy oblysy (Karaganda) / Kasachstan
Gerhardtit
Views (Image: 1374427425): 1185
Gerhardtit (SNr: A024270)

Tafelige grüne Kristalle, BB = 1,8 mm, Fundort: Golf von Baratti, Populonia, Livorno, Toskana, Italien.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2013-07-21
Locality: Golf von Baratti / Populonia / Livorno, Provinz / Toskana (Toscana) / Italien
Rouait und Gerhardtit
Views (Image: 1283663509): 3412
Rouait und Gerhardtit

Bildbreite: 7 mm; Fundort: Grube Clara, Oberwolfach, Schwarzwald, Deutschland; durch PXRD bestätigt

Copyright: Fritz Schreiber
Contribution: slugslayer 2010-09-05
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color grün
Streak color hellgrün
Hardness (Mohs) 2
Solubility +++ verdünnte Säuren, - H2O
Crystal System orthorhombisch, P212121

Additional information / Summary

Gerhardtit ist schwer von Rouait zu unterscheiden.

Chemism

Chem­ical formula

Cu2(NO3)(OH)3

Chem­ical com­po­si­tion

Kupfer, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 240.119741 u; Number of atoms in the formula: 12

Info

Empirical formula:

Cu2(NO3)(OH)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.26

3

25.00

1.0079470

3.0238410

Nitrogen

N

5.83

1

8.33

14.0067200

14.0067200

Oxygen

O

39.98

6

50.00

15.9994300

95.9965800

Copper

Cu

52.93

2

16.67

63.5463000

127.0926000

Anal­y­sis wt%

CuO : 66.38, N2O5 : 22.76, H2O : 11.26 (Ref: Dana, 7th ed. 2)

Strunz 9th edi­tion incl. updates

5.NB.05

5: Carbonate (Carbonate, Nitrate)
N: Nitrate
B: Mit OH
05:Gerhardtit-Gruppe

Lapis Clas­sifica­tion

V/A.03-010

V: NITRATE, CARBONATE UND BORATE
A: Nitrate [NO3] 1-

Clas­sifica­tion by Hölzel

5.HB.100

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
H: Nitrates
B: Nitrates (+Anions -Water)

Dana 8th edi­tion

19.01.01.01

19: Nitrates - Hydroxyl or Halogen
01: Nitrates - Hydroxyl or Halogen with miscellaneous formulae

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grün

Streak color

hellgrün

max. Birefrin­gence

0.019

Birefringence chart\! Gerhardtite title=Birefringence chart Gerhardtite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.703

RI value β

1.713

RI value γ / ε

1.722

Ri mean

1.713

2V angle

Biaxial (+)- 90°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

222

Space Group number

19

Space Group

P212121

Cell param­e­ters a (Å)

5.598

Cell param­e­ters b (Å)

6.080

Cell param­e­ters c (Å)

13.830

Cell param­e­ters a/b or c/a

0.921

Cell param­e­ters c/b

2.275

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

470.716

X-Ray Pow­der Diffrac­tion

6.91(100),
3.454(60),
2.797(60),
2.669(60),
2.624(80),
2.595(70),
2.310(80),
1.579(80)

XRD chart Gerhardtite

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

VHN (Hard­ness Vick­ers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.42 (gemessen)

3.388 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ verdünnte Säuren, - H2O

Preface

Author (Name, Year)

Wells & Penfield, 1885

Addi­tional Informa­tion

Synthese beschrieben von C. H. Yoder, E. Bushong, X. Liu, V. Weidner, P. McWilliams, K. Martin, J. Lorgunpai, J. Haller, R. W. Schaeffer: The synthesis and solubility of the copper hydroxyl nitrates: gerhardtite, rouaite and likasite. Mineralogical Magazine 74 (2010) S. 433-440.

References

Canadian Mineralogist 44 (2006), 1447

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

Rouaite

Cu2(NO3)(OH)3

monoklin : 2 : P21

5.NB.05

Gerhardtite

Cu2(NO3)(OH)3

orthorhombisch : 222 : P212121

5.NB.05

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

Gerhardtite

Cu2(NO3)(OH)3

orthorhombisch : 222 : P212121

V/A.03-010

Rouaite

Cu2(NO3)(OH)3

monoklin : 2 : P21

V/A.03-015

Likasite

Cu3(NO3)(OH)5·2H2O

orthorhombisch : mmm : Pcmn

V/A.03-020

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

Gerhardtite

Cu2(NO3)(OH)3

orthorhombisch : 222 : P212121

5.HB.100

Likasite

Cu3(NO3)(OH)5·2H2O

orthorhombisch : mmm : Pcmn

5.HB.120

Rouaite

Cu2(NO3)(OH)3

monoklin : 2 : P21

5.HB.125

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

Gerhardtite

Cu2(NO3)(OH)3

orthorhombisch : 222 : P212121

19.01.01.01

Rouaite

Cu2(NO3)(OH)3

monoklin : 2 : P21

19.01.01.02

Buttgenbachite

Cu36(NO3)2Cl6(OH)64·nH2O

hexagonal : 6/mmm : P63/mmc

19.01.02.01

Sveite

KAl7(NO3)4Cl2(OH)16·8H2O

19.01.03.01

Mbobomkulite

(Ni,Cu)Al4[(NO3)2,(SO4)](OH)12·3H2O

19.01.04.01

Hydrombobomkulite

(Ni,Cu)Al4[(NO3)2,(SO4)](OH)12·13-14H2O

19.01.04.02

Likasite

Cu3(NO3)(OH)5·2H2O

orthorhombisch : mmm : Pcmn

19.01.05.01

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Герхардтит

Mineral Dealer

German pages

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

Locations with GPS information