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Morelandite

Collectors Summary

Color grünlichgelb, grau, graulich gelb, hellgelb
Streak color weiß
Lustre Fettglanz, Glasglanz
Hardness (Mohs) 4.5
Crystal System hexagonal, P63/m

Chemism

Chemical formula

Ca2Ba3(AsO4)3Cl

Empirical formula (analysis)

Ba2.25Ca1.65Pb1.16Fe0.06Mn0.06)[(AsO4)2.56(PO4)0.30]Cl1.09

Additional chem. information

neue Idealformel (siehe Referenz) ehemals: (Ba,Ca,Pb)5(AsO4,PO4)3Cl

Chemical composition

Arsen, Barium, Calcium, Chlor, Sauerstoff

Unit weight: 1044.896176674 u; Number of atoms in the formula: 20.57

Info

Empirical formula:

Ba2.25Ca1.65Pb1.16Fe0.06Mn0.06)[(AsO4)2.56(PO4)0.30]Cl1.09

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

17.52

11.44

55.61

15.9994300

183.0334792
Phosphorus

P

0.89

0.3

1.46

30.9737612

9.2921284
Chlorine

Cl

3.70

1.09

5.30

35.4532000

38.6439880
Calcium

Ca

6.33

1.65

8.02

40.0784000

66.1293600
Manganese

Mn

0.32

0.06

0.29

54.9380499

3.2962830
Iron

Fe

0.32

0.06

0.29

55.8452000

3.3507120
Arsenic

As

18.36

2.56

12.45

74.9216020

191.7993011
Barium

Ba

29.57

2.25

10.94

137.3277000

308.9873250
Lead

Pb

23.00

1.16

5.64

207.2100000

240.3636000

Analysis wt%

CaO : 8.85, BaO : 33.00, PbO : 24.85, FeO : 0.41, As2O5 : 28.11, P2O5 : 2.05, Cl : 3.69 (Ref: Canadian Mineralogist 78)

Strunz 9th edition incl. updates

8.BN.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
N: Mit ausschließlich [Kationen] (OH, etc.):RO4 = 0.33:1
05:Apatit-Gruppe

Lapis Classification

VII/B.39-130

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

Classification by Hölzel

8.BO.440

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
O: Apatite Supergroup
4: Hedyphanes with ~[PO4], ~[AsO4], ~[VO4]

Dana 8th edition

41.08.05.01

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
08: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A)5 (XO4)3 Zq
05: Morelandite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Apatite Supergroup  ⇒ Hedyphane group

Optical Properties

Color

grünlichgelb, grau, graulich gelb, hellgelb

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

Lustre

Fettglanz, Glasglanz

max. Birefringence

0.004
Birefringence chart\! Morelandite title=Birefringence chart Morelandite

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

1.880

RI value γ / ε

1.884

Ri mean

1.881

2V angle

Uniaxial (+)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

10.169

Cell parameters b (Å)

-

Cell parameters c (Å)

7.315

Cell parameters a/b or c/a

0.719

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

655.091

X-Ray Powder Diffraction

8.86(20),
5.089(30),
4.175(30),
3.658(50),
3.335(20),
3.030(100),
2.969(70),
1.965(30)
XRD chart Morelandite

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

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)

5.33 (gemessen) 5.3 (berechnet)

5.297 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Nordmark (Nordmarksberg)/Jakobsberg

Preface

Author (Name, Year)

Dunn & Rouse, 1978

References

Canadian Mineralogist 16 (1978), 601

Pasero M, Kampf AR, Ferraris C, Pekov IV, Rakovan J, White TJ (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy 22: 163-179 [ideale Formel]

IMA group assignments

Other languages

German

Morelandit

Spanish

Morelandita

English

Morelandite

French

Morelandite

Russian

Мореландит

https://catalogmineralov.ru/mineral/morelandite.html

CNMNC (IMA)-Number

IMA 1977-035

CNMNC symbol

Symbol

Mldt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) sojCp4Z4a0q5J0YMX6M17g
GUID (Global unique identifier) A7C288B2-7886-4A6B-B927-460C5FA335EE
Database ID 2605