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Gamagarite

Pictures (4 Images total)

rotbrauner Gamagarit
Views (File:
1217397825
): 1093
rotbrauner Gamagarit
Bildbreite: 7 mm; Fundort: Grube Cerchiara, Vara-Tal, Ligurien, Italien
Copyright: Leonardus; Contribution: slugslayer
Location: Italien/Ligurien (Liguria), Region/La Spezia, Provinz/Vara-Tal/Cerchiara Mine
Mineral: Gamagarite
Image: 1217397825
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
rotbrauner Gamagarit

Bildbreite: 7 mm; Fundort: Grube Cerchiara, Vara-Tal, Ligurien, Italien

Copyright: Leonardus
Contribution: slugslayer 2008-07-30
Locality: Cerchiara Mine / Vara-Tal / La Spezia, Provinz / Ligurien (Liguria), Region / Italien
Gamagarit
Views (File:
1285410775
): 864
Gamagarit
Bildbreite: 4 mm, Fundort: Grube Molinello, Genova, Ligurien, Italien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Italien/Ligurien (Liguria), Region/Genua (Genova), Metropolitanstadt/Ne/Val Graveglia/Miniera di Molinello
Mineral: Gamagarite
Image: 1285410775
Rating: 3.5 (votes: 2)
License: Usage for Mineralienatlas project only
Gamagarit

Bildbreite: 4 mm, Fundort: Grube Molinello, Genova, Ligurien, Italien

Copyright: Luigi Chiappino
Contribution: thdun5 2010-09-25
Locality: Miniera di Molinello / Val Graveglia / Ne / Genua (Genova), Metropolitanstadt / Ligurien (Liguria), Region / Italien
Multiphasenparagenese in Trachyt von La Mareta, Teneriffa
Views (File:
1659973687
): 16
Multiphasenparagenese in Trachyt von La Mareta, Teneriffa
Gamagarit (GAM) mit Kanemit (KAN), Kutnohorit (KUT umd Quarz (QUA. Bildbreite 2,8 mm
Copyright: Kurt Rüsenberg; Contribution: humboldt
Collection: humboldt
Location: Spanien/Kanarische Inseln/Teneriffa/La Mareta
Mineral: Gamagarite, Kanemite, Kutnohorite, Quartz
Rock: trachyte
Image: 1659973687
License: Usage for Mineralienatlas project only
Multiphasenparagenese in Trachyt von La Mareta, Teneriffa

Gamagarit (GAM) mit Kanemit (KAN), Kutnohorit (KUT umd Quarz (QUA. Bildbreite 2,8 mm

Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2022-08-08
Locality: La Mareta / Teneriffa / Kanarische Inseln / Spanien
Gamagarit von La Mareta, Teneriffa
Views (File:
1659974188
): 15
Gamagarit von La Mareta, Teneriffa
Schwarzer Gamagarit in Begleitung von beigem Kutnohorit-Pusteln in Trachyt. Bildbreite 2,5 mm
Copyright: Kurt Rüsenberg; Contribution: humboldt
Collection: humboldt
Location: Spanien/Kanarische Inseln/Teneriffa/La Mareta
Mineral: Gamagarite, Kutnohorite
Rock: trachyte
Image: 1659974188
License: Usage for Mineralienatlas project only
Gamagarit von La Mareta, Teneriffa

Schwarzer Gamagarit in Begleitung von beigem Kutnohorit-Pusteln in Trachyt. Bildbreite 2,5 mm

Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2022-08-08
Locality: La Mareta / Teneriffa / Kanarische Inseln / Spanien

Collectors Summary

Color bräunlichschwarz, dunkelbraun, schwarz
Hardness (Mohs) 4.75
Crystal System monoklin, P21/m

Chemism

Chemical formula

Ba2Fe3+(VO4)2(OH)

Chemical composition

Barium, Eisen, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 577.386437 u; Number of atoms in the formula: 15

Info

Empirical formula:

Ba2Fe(VO4)2(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.17

1

6.67

1.0079470

1.0079470

Oxygen

O

24.94

9

60.00

15.9994300

143.9948700

Vanadium

V

17.65

2

13.33

50.9415100

101.8830200

Iron

Fe

9.67

1

6.67

55.8452000

55.8452000

Barium

Ba

47.57

2

13.33

137.3277000

274.6554000

Analysis wt%

BaO : 48.37, SrO : 3.60, Fe2O3 : 7.80, Mn2O3 : 6.11, V2O5 : 29.07, As2O5 : 3.47, H2O : 1.58 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 87)

Strunz 9th edition incl. updates

8.BG.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
G: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 0.5:1
05:Brackebuschit-Gruppe

Lapis Classification

VII/B.24-020

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
24: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Brackebuschit- Gruppe

Classification by Hölzel

8.BM.330

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
M: Phosphates, very large: 2, Vmed: 2,3
3: Bearthite-Brackebuschite-Group

Dana 8th edition

41.10.04.03

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
10: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A++ B++)3 (XO4)2 Zq
04: Goedkenite Group

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Brackebuschite supergroup  ⇒ Brackebuschite group

Optical Properties

Color

bräunlichschwarz, dunkelbraun, schwarz

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.114

Birefringence chart\! Gamagarite title=Birefringence chart Gamagarite

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

2.016

RI value β

2.040

RI value γ / ε

2.130

Ri mean

2.062

2V angle

Biaxial (+) 54°~

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

9.121

Cell parameters b (Å)

6.142

Cell parameters c (Å)

7.838

Cell parameters a/b or c/a

1.485

Cell parameters c/b

1.276

Cell parameters α

90°

Cell parameters β

112.88

Cell parameters γ

90°

Z

2

Volumne (ų)

404.547

X-Ray Powder Diffraction

4.969(10),
4.627(10),
3.711(10),
3.469(10),
3.309(100),
3.051(80),
2.805(80),
2.349(50)

XRD chart Gamagarite

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)

4.75

VHN (Hardness Vickers)

340 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.62

4.74 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

de Villiers, 1943

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 205

IMA group assignments


 
 
M2+2M3+(TO4)2(OH)
 
 

 
 
 
Pb2(Fe3+,Zn)(AsO4)2(OH,H2O)
monoklin
P21/m

 
 
 
Pb2Cu(AsO4)(SO4)OH
monoklin
P21/m

 
 
 
Ca2Al(PO4)2(OH)
monoklin
P21/m

 
 
 
Pb2Mn3+(VO4)2(OH)
monoklin
P21/m

 
 
 
Pb2Fe3+[OH|(VO4)2]
monoklin
P21/m

 
 
 
Ba2Fe3+(AsO4)2(OH)
monoklin
P21/m

 
 
 
Pb2Zn(AsO4)2·H2O
monoklin
P21, P21/m

 
 
 
Pb2Fe3+(PO4)(VO4)(OH)
monoklin
P21/m

 
 
 
Ba2Fe3+(VO4)2(OH)
monoklin
P21/m

 
 
 
(Sr,Ca)2Al(PO4)2(OH)
monoklin
P21/m

 
 
 
Sr2Al(AsO4)2(OH)
monoklin
P21/m

 
 
 
Pb5Fe22+(VO4)2O4
monoklin
P21/m

 
 
 
Ba2Mn3+(AsO4)2(OH)
monoklin
P21/m

 
 
 
Ba2Mn(VO4)2(OH)
monoklin
P21/m

 
 
 
Pb2Cu(PO4)(SO4)(OH)
monoklin
P21/m

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Actuality: 28. Sep 2022 - 10:51:49

Other languages

German

Gamagarit

Spanish

Gamagarita

English

Gamagarite

French

Gamagarite

Russian

Гамагарит

Japanese

ガマガライト

CNMNC symbol

Symbol

Gam

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