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Hedegaardite

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Hedegaardit
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Hedegaardit
REM-Bild von Rhomboedern von Hedegaardit, Morro Mejillones, Mejillones, Antofagasta Region, Chile; BB unbekannt, analysiert mittels REM-EDX und XRD
Copyright: Joy Desor; Contribution: openpit
Location: Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Mejillones, Comuna
Mineral: Hedegaardite
Image: 1587142922
License: Usage for Mineralienatlas project only
Hedegaardit  E
Analysed with energy dispersive X-ray spectroscopy EDX
X
Analysed with X-ray diffraction XRD

REM-Bild von Rhomboedern von Hedegaardit, Morro Mejillones, Mejillones, Antofagasta Region, Chile; BB unbekannt, analysiert mittels REM-EDX und XRD
Copyright: Joy Desor
Contribution: openpit 2020-04-17
Locality: Mejillones, Comuna / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Crystal System trigonal, R3c

Chemism

Chemical formula

(Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH)

Additional chem. information

Whitlockit-Gruppe

Chemical composition

Calcium, Magnesium, Natrium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 1048.1758009 u; Number of atoms in the formula: 47

Info

Empirical formula:

(Ca0.75Na0.25)9(Ca0.75Na0.25)Mg(PO4)6(PO3OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.10

1

2.13

1.0079470

1.0079470
Oxygen

O

42.74

28

59.57

15.9994300

447.9840400
Sodium

Na

5.48

2.5

5.32

22.9897702

57.4744255
Magnesium

Mg

2.32

1

2.13

24.3050600

24.3050600
Phosphorus

P

20.69

7

14.89

30.9737612

216.8163284
Calcium

Ca

28.68

7.5

15.96

40.0784000

300.5880000

Strunz 9th edition incl. updates

8.AC.

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen [Kationen]

IMA status

von der CNMNC anerkanntes Mineral; CNMNC Newsletter No. 23, Februar 2015

Mineral status

anerkanntes Mineral

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

161

Space Group

R3c

Cell parameters a (Å)

10.3519(9)

Cell parameters b (Å)

-

Cell parameters c (Å)

37.064(5)

Cell parameters a/b or c/a

3.58

Cell parameters c/b

-

Volume (ų)

3439.72

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

5.189(37), 3.431(35), 3.190(61), 2.862(100), 2.741(21), 2.595(68), 1.922(25), 1.715(33)
XRD chart Hedegaardite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

(Co-)Type locality

(Co-)Type locality

Chile/Tarapacá, Region (I. Region)/Iquique, Provinz/Punta de Lobos

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Mejillones, Comuna/Mejillones, Halbinsel/Cerro Mejillones

Type material

Bergakademie Freiberg, Freiberg, Deutschland

Collection number of type material

83808 (Punta de Lobos) und 83809 (Cerro Mejillones)

Preface

Author (Name, Year)

Thomas Witzke, Brian L. Phillips, William Woerner, Jose´ M.V. Countinho, Gunnar Färber and Reynaldo R. Contreira Filho (2015)

References

Witzke, T., Phillips, B.L., Woerner, W., Countinho, J.M.V., Färber, G. and Contreira Filho, R.R. (2015) Hedegaardite, IMA 2014-069. CNMNC Newsletter No. 23, February 2015, page 54; Mineralogical Magazine, 79, 51-58.

Other languages

German

Hedegaardit

English

Hedegaardite

Russian

Хедегаардит

CNMNC (IMA)-Number

IMA 2014-069

CNMNC symbol

Symbol

Hed

Locations with GPS information

IDs

GUSID (Global unique identifier short form) tBUmop5s1UihKTWLXsPKRg
GUID (Global unique identifier) A22615B4-6C9E-48D5-A129-358B5EC3CA46
Database ID 7870