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Gatehouseite (Gatehouseit)

Pictures (2 Images total)

Gatehouseit
Views (File:
1358868696
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Gatehouseit
Brauner Gatehouseit mit weißem Calcit. Iron Monarch Open Cut, Iron Knob, South Australia, Australien. BB 0,8mm
Copyright: Mabu; Contribution: Mabu
Collection: Mabu
Location: Australien/South Australia/Eyre Peninsula/Middleback Range/Iron Knob/Iron Monarch Opencut
Mineral: Gatehouseite
Image: 1358868696
Rating: 8.2 (votes: 5)
License: Usage for Mineralienatlas project only
Gatehouseit

Brauner Gatehouseit mit weißem Calcit. Iron Monarch Open Cut, Iron Knob, South Australia, Australien. BB 0,8mm
Collection: Mabu
Copyright: Mabu
Contribution: Mabu 2013-01-22
Locality: Iron Monarch Opencut / Iron Knob / Middleback Range / Eyre Peninsula / South Australia / Australien
Gatehouseit
Views (File:
1206229075
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Gatehouseit
Bildbreite: 2 mm; Fundort: Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australien
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Australien/South Australia/Eyre Peninsula/Middleback Range/Iron Knob/Iron Monarch Opencut
Mineral: Gatehouseite
Image: 1206229075
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Gatehouseit

Bildbreite: 2 mm; Fundort: Iron Monarch open cut, Iron Knob, Middleback Range, Eyre peninsula, South Australia, Australien
Copyright: Stephan Wolfsried
Contribution: Hg 2008-03-23
Locality: Iron Monarch Opencut / Iron Knob / Middleback Range / Eyre Peninsula / South Australia / Australien

Collectors Summary

Color gelb, gelb, blass orange
Streak color hellgelb
Hardness (Mohs) 4
Cleavages deutlich {010}
Fracture splittrig
Crystal System orthorhombisch, P212121

Chemism

Chemical formula

Mn52+[(OH)2|PO4]2

Chemical composition

Mangan, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 532.6627199 u; Number of atoms in the formula: 23

Info

Empirical formula:

Mn5[(OH)2PO4]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.76

4

17.39

1.0079470

4.0317880
Oxygen

O

36.04

12

52.17

15.9994300

191.9931600
Phosphorus

P

11.63

2

8.70

30.9737612

61.9475224
Manganese

Mn

51.57

5

21.74

54.9380499

274.6902495

Analysis wt%

MnO : 64.42, P2O5 : 22.18, As2O5 : 3.58, H2O : 6.44 (Ref: Mineralogical Magazine 93)

Strunz 9th edition incl. updates

8.BD.10

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
D: Mit ausschließlich mittelgroßen [Kationen] (OH, etc.):RO4 = 2:1
10:Arsenoklasit-Gruppe

Lapis Classification

VII/B.11-065

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
11: Mittelgroße Kationen: Mg-Mn-Fe-Cu-Zn

Classification by Hölzel

8.BC.300

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
C: Phosphates, C medium, V: 2, OH/XO4=2/1
3: Orthorhombic Arsenoclasite-Group

Dana 8th edition

41.04.01.02

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
04: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A B)5 (XO4)2 Zq

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelb, gelb, blass orange

Streak color

hellgelb

Diaphaneity (Transparency)

transparent

max. Birefringence

0.02~
Birefringence chart\! Gatehouseite title=Birefringence chart Gatehouseite

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

1.74

RI value γ / ε

1.76

Ri mean

1.75~

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

222

Space Group number

19

Space Group

P212121

Cell parameters a (Å)

17.973

Cell parameters b (Å)

5.692

Cell parameters c (Å)

9.130

Cell parameters a/b or c/a

3.158

Cell parameters c/b

1.604

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

934.02

X-Ray Powder Diffraction

4.483(10),
4.034(10),
2.900(100),
2.853(70),
2.802(50),
2.702(80),
2.022(10),
1.608(10)
XRD chart Gatehouseite

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

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.74

3.788 ( ρ calc. Mineralienatlas )

Cleavages

deutlich {010}

Fracture

splittrig

(Co-)Type locality

(Co-)Type locality

Australien/South Australia/Eyre Peninsula/Middleback Range/Iron Knob/Iron Monarch Opencut

Preface

Author (Name, Year)

Pring & Birch, 1993

References

Mineralogical Magazine 57 (1993), 309

Other languages

German

Gatehouseit

English

Gatehouseite

French

Gatehouseite

Spanish

Gatehouseíta

Russian

Гейтхаузит

Alternative Name

German

Gatehousit

Spanish

Gatehousita

Gatehousite

CNMNC (IMA)-Number

IMA 1992-016

CNMNC symbol

Symbol

Ghs

Locations with GPS information