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Gormanite

Pictures (21 Images total)

Gormanit auf Albit
Views (File:
1215470511
): 1886
Gormanit auf Albit
FO.: Linopolis, Divino das Laranjeiras, Minas Gerais, Brasilien / Stufengröße: 8,5 x 6,5 cm
Copyright: Hrouda; Contribution: Hrouda
Collection: Museum für Naturkunde Gera
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)
Mineral: Gormanite
Image: 1215470511
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Gormanit auf Albit

FO.: Linopolis, Divino das Laranjeiras, Minas Gerais, Brasilien / Stufengröße: 8,5 x 6,5 cm
Collection: Museum für Naturkunde Gera
Copyright: Hrouda
Contribution: Hrouda 2008-07-07
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Gormanit
Views (File:
1261827350
): 1888
Gormanit
Gormanit zwischen Siderit; FO: Yukon Territorium, Kanada,; X-Größe etwa 2mm
Copyright: rtbstone; Contribution: rtbstone
Collection: rtbstone
Location: Kanada/Yukon-Territorium
Mineral: Gormanite
Image: 1261827350
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Gormanit

Gormanit zwischen Siderit; FO: Yukon Territorium, Kanada,; X-Größe etwa 2mm
Collection: rtbstone
Copyright: rtbstone
Contribution: rtbstone 2009-12-26
Locality: Yukon-Territorium / Kanada
Büschel tannengrüner nadeliger Gormanit-Kristalle bis 9 mm Länge, auf Albit
Views (File:
1124068816
): 1357
Büschel tannengrüner nadeliger Gormanit-Kristalle bis 9 mm Länge, auf Albit
Bildbreite: 18 mm; Fundort: Linopolis, Doce-Tal, Minas Gerais, Brasilien
Copyright: Peter Haas; Contribution: Peter Haas
Collection: Peter Haas
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)
Mineral: Gormanite
Image: 1124068816
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Büschel tannengrüner nadeliger Gormanit-Kristalle bis 9 mm Länge, auf Albit

Bildbreite: 18 mm; Fundort: Linopolis, Doce-Tal, Minas Gerais, Brasilien
Collection: Peter Haas
Copyright: Peter Haas
Contribution: Peter Haas 2005-08-15
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Gormanit
Views (File:
1306615418
): 1116
Gormanit
Big Fish River, Dawson Mining District, Yukon Territory, Canada, 47x32 mm
Copyright: Embarak; Contribution: Embarak
Collection: Embarak
Location: Kanada/Yukon-Territorium/Dawson Mining District/Richardson Mountains/Big Fish River
Mineral: Gormanite
Image: 1306615418
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Gormanit

Big Fish River, Dawson Mining District, Yukon Territory, Canada, 47x32 mm
Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2011-05-28
Locality: Big Fish River / Richardson Mountains / Dawson Mining District / Yukon-Territorium / Kanada
Gormanit
Views (File:
1294399915
): 1188
Gormanit
Größe: 4 mm; Fundort: Big Fish River, Yukon Territory, Kanada
Copyright: Enrico Bonacina; Contribution: Hg
Location: Kanada/Yukon-Territorium/Dawson Mining District/Richardson Mountains/Big Fish River
Mineral: Gormanite
Image: 1294399915
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Gormanit

Größe: 4 mm; Fundort: Big Fish River, Yukon Territory, Kanada
Copyright: Enrico Bonacina
Contribution: Hg 2011-01-07
Locality: Big Fish River / Richardson Mountains / Dawson Mining District / Yukon-Territorium / Kanada

You find additional specimen at the Geolitho Museum

Collectors Summary

Color blau grün
Streak color blass grün
Hardness (Mohs) 4.5
Crystal System triklin, P1

Additional information / Summary

Chemism

Chemical formula

Fe2+3Al4(PO4)4(OH)6·2H2O

Chemical composition

Aluminium, Eisen, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 793.4225876 u; Number of atoms in the formula: 45

Info

Empirical formula:

Fe3Al4(PO4)4(OH)6·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.27

10

22.22

1.0079470

10.0794700
Oxygen

O

48.40

24

53.33

15.9994300

383.9863200
Aluminium

Al

13.60

4

8.89

26.9815382

107.9261528
Phosphorus

P

15.62

4

8.89

30.9737612

123.8950448
Iron

Fe

21.12

3

6.67

55.8452000

167.5356000

Analysis wt%

MgO : 6.65, FeO : 14.68, Al2O3 : 25.51, Fe2O3 : 3.82, P2O5 : 37.23, H2O : 11.45 (Ref: Canadian Mineralogist 81)

Strunz 9th edition incl. updates

8.DC.45

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
C: Mit ausschließlich mittelgroßen [Kationen], (OH, etc.):RO4 = 1:1 und < 2:1
45:Souzalith-Gruppe

Lapis Classification

VII/D.11-100

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
11: Mittelgroße Kationen: Cu-Zn-Mn-Al-Fe

Classification by Hölzel

8.DF.420

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
F: Dufrenite-Group P/OH > 0.5

Dana 8th edition

42.09.02.02

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
09: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (A)3 (XO4)2 Zq · x(H2O)
02: Souzalite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blau grün

Streak color

blass grün

max. Birefringence

0.041
Birefringence chart\! Gormanite title=Birefringence chart Gormanite

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

1.619

RI value β

1.653

RI value γ / ε

1.660

Ri mean

1.644

2V angle

Biaxial (-) 53°

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

1

Space Group

P1

Cell parameters a (Å)

7.222

Cell parameters b (Å)

11.780

Cell parameters c (Å)

5.117

Cell parameters a/b or c/a

0.613

Cell parameters c/b

0.434

Cell parameters α

90.15

Cell parameters β

109.93

Cell parameters γ

81.33

Z

1

Volume (ų)

404.024

X-Ray Powder Diffraction

6.72(30),
4.761(60),
3.395(100),
3.154(60),
3.093(30),
3.062(40),
2.925(80),
2.554(90)
XRD chart Gormanite

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)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.13

3.261 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Kanada/Yukon-Territorium/Dawson Mining District/Richardson Mountains/Big Fish River

Kanada/Yukon-Territorium/Dawson Mining District/Richardson Mountains/Rapid Creek/Kulan Camp (Area A)/Crosscut Creek

Preface

Author (Name, Year)

Sturman & Mandarino & Mrose & Dunn, 1981

References

Canadian Mineralogist 19 (1981), 381

Other languages

German

Gormanit

Spanish

Gormanita

French

Gormanite

English

Gormanite

Russian

Горманит

CNMNC (IMA)-Number

IMA 1977-030

CNMNC symbol

Symbol

Gm

Locations with GPS information

IDs

GUSID (Global unique identifier short form) tMpynPHyQUWRk3mXbH-kmg
GUID (Global unique identifier) 9C72CAB4-F2F1-4541-9193-79976C7FA49A
Database ID 1427