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Curetonite (Curetonit)

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Curetonit xx (blaßgrün)
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Curetonit xx (blaßgrün)
Redhouse Mine,Osgood Mtns.bei Golconda,Humboldt Co./Nevada USA; Bildbreite ca.4mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: USA/Nevada/Humboldt Co./Golconda District/Redhouse Barite Mine
Mineral: Curetonite
Image: 1504282745
License: Usage for Mineralienatlas project only
Curetonit xx (blaßgrün)

Redhouse Mine,Osgood Mtns.bei Golconda,Humboldt Co./Nevada USA; Bildbreite ca.4mm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2017-09-01
Locality: Redhouse Barite Mine / Golconda District / Humboldt Co. / Nevada / USA

Collectors Summary

Color gelblichgrün
Streak color weiß
Hardness (Mohs) 3.5
Solubility - Säuren
Crystal System monoklin, P21/n

Chemism

Chemical formula

Ba(Al,Ti4+)(PO4)(O,OH)F

Chemical composition

Aluminium, Barium, Titan, Fluor, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 299.75192985 u; Number of atoms in the formula: 9.25

Info

Empirical formula:

Ba(Al0.75Ti0.25)(PO4)(O0.75(OH)0.25)F

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.08

0.25

2.70

1.0079470

0.2519868

Oxygen

O

26.69

5

54.05

15.9994300

79.9971500

Fluorine

F

6.34

1

10.81

18.9984033

18.9984033

Aluminium

Al

6.75

0.75

8.11

26.9815382

20.2361537

Phosphorus

P

10.33

1

10.81

30.9737612

30.9737612

Titanium

Ti

3.99

0.25

2.70

47.8671000

11.9667750

Barium

Ba

45.81

1

10.81

137.3277000

137.3277000

Analysis wt%

P2O5 : 22.83, Al2O3 : 13.20, TiO2 : 4.08, V2O3 : 0.65, BaO : 51.30, H2O : 2.50, F : 6.46 (Ref: American Mineralogist 94)

Strunz 9th edition incl. updates

8.BK.15

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
K: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 2:1, 2.5:1
15:Curetonit-Gruppe

Lapis Classification

VII/B.32-010

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

Classification by Hölzel

8.BM.240

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

Dana 8th edition

41.05.15.01

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelblichgrün

Streak color

weiß

max. Birefringence

0.027

Birefringence chart\! Curetonite title=Birefringence chart Curetonite

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

1.676

RI value β

1.680

RI value γ / ε

1.693

Ri mean

1.683

2V angle

Biaxial (+) 60°

Orientation

X = b, Z ^ c = 30

Dispersion

Schwach, r <v; stark geneigte Dispersion

Absorption

X > Y = Z

Pleochroism

Schattierungen von gelb

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

6.977

Cell parameters b (Å)

12.564

Cell parameters c (Å)

5.223

Cell parameters a/b or c/a

0.555

Cell parameters c/b

0.416

Cell parameters α

90°

Cell parameters β

102.15

Cell parameters γ

90°

Z

4

Volumne (ų)

447.587

X-Ray Powder Diffraction

4.290(50),
3.286(80),
3.230(100),
2.991(60),
2.816(60),
2.251(60),
2.199(60),
1.686(70)

XRD chart Curetonite

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)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.42 (gemessen)

4.448 ( ρ calc. Mineralienatlas )

Instability

- Säuren

Preface

Author (Name, Year)

Williams, 1979

References

Mineralogical Record 10 (1979), 219

Other languages

German

Curetonit

Spanish

Curetonita

English

Curetonite

French

Curetonite

Russian

Куретонит

CNMNC (IMA)-Number

IMA 1978-065

CNMNC symbol

Symbol

Cut

Locations with GPS information