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Springcreekite (Springcreekit)

Collectors Summary

Color schwarz
Streak color bräunlichschwarz
Lustre Diamantglanz, Halbmetallglanz
Hardness (Mohs) 4.5
Cleavages undeutlich {102}
Fracture unregelmäßig
Solubility - kalte konz. HCl, kalte 10% HNO3, + heiße konz. HCl
Crystal System trigonal, R3m

Chemism

Chemical formula

BaV3+3(PO4)(PO3OH)(OH)6

Chemical composition

Barium, Phosphor, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 583.1474014 u; Number of atoms in the formula: 27

Info

Empirical formula:

BaV3(PO4)(PO3OH)(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.21

7

25.93

1.0079470

7.0556290
Oxygen

O

38.41

14

51.85

15.9994300

223.9920200
Phosphorus

P

10.62

2

7.41

30.9737612

61.9475224
Vanadium

V

26.21

3

11.11

50.9415100

152.8245300
Barium

Ba

23.55

1

3.70

137.3277000

137.3277000

Strunz 9th edition incl. updates

8.BL.10

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
L: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 3:1
10:Crandallit-Gruppe

Lapis Classification

VII/B.36-155

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

Classification by Hölzel

8.BK.180

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
K: Phosphatian (+AsO4) Alunites, trigonal, very large: 1,2,3,4, Vmed: 3
1: With Ca,Sr,Ba Goyazite-Crandallite-Group

Dana 8th edition

42.07.03.08

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
07: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)5 (XO4)3 Zq · x(H2O)
03: Crandallite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Alunite supergroup  ⇒ Plumbogummite group with -1c

Optical Properties

Color

schwarz

Streak color

bräunlichschwarz

Diaphaneity (Transparency)

opak bis durchscheinend

Lustre

Diamantglanz, Halbmetallglanz

max. Birefringence

0.041
Birefringence chart\! Springcreekite title=Birefringence chart Springcreekite

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

1.817

RI value γ / ε

1.858

Ri mean

1.844

2V angle

Uniaxial (-)

Absorption

O > E

Pleochroism

sehr stark, blass braun zu schwarz

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

7.258

Cell parameters b (Å)

-

Cell parameters c (Å)

17.361

Cell parameters a/b or c/a

2.392

Cell parameters c/b

-

Z

3

Volumne (ų)

792.026

X-Ray Powder Diffraction

5.90(90),
3.627(40),
3.073(100),
2.954(30),
2.547(30),
2.301(40),
1.971(50),
1.814(40)
XRD chart Springcreekite

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)

3.48

3.668 ( ρ calc. Mineralienatlas )

Cleavages

undeutlich {102}

Fracture

unregelmäßig

Tenacity

spröde

Instability

- kalte konz. HCl, kalte 10% HNO3, + heiße konz. HCl

(Co-)Type locality

(Co-)Type locality

Australien/South Australia/Flinders Ranges/South Flinders Ranges/Wilmington/Spring Creek Mine

Preface

Name from

Für die Typlokalität Spring Creek Mine

Author (Name, Year)

Kolitsch & Taylor & Fallon & Pring, 1999

References

Kolitsch, U., Taylor, M., Fallon, G. and Pring, A. - Springcreekite, BaV3+3(PO4)2(OH,H2O)6, a new member of the crandallite group, from the Spring Creek mine, South Australia: the first natural V3+-member of the alunite family. Neues Jahrbuch für Mineralogie, Monatshefte (1999), 529

IMA group assignments

Other languages

German

Springcreekit

Spanish

Springcreekita

French

Springcreekite

English

Springcreekite

Russian

Спрингкрикит

CNMNC (IMA)-Number

IMA 1998-048

CNMNC symbol

Symbol

Sck

Locations with GPS information