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Dittmarite (Dittmarit)

Pictures (2 Images total)

Dittmarit
Views (File:
1586176805
): 425
Dittmarit
weiße Massen von Dittmarit, Pabellon de Pica, Chanabaya, Iquique Provinz, Tarapacá Region, Chile; BB < 1 cm
Copyright: Joy Desor; Contribution: openpit
Location: Chile/Tarapacá, Region (I. Region)/Iquique, Provinz/Chanabaya/Pabellón de Pica
Mineral: Dittmarite
Image: 1586176805
License: Usage for Mineralienatlas project only
Dittmarit

weiße Massen von Dittmarit, Pabellon de Pica, Chanabaya, Iquique Provinz, Tarapacá Region, Chile; BB < 1 cm
Copyright: Joy Desor
Contribution: openpit 2020-04-06
Locality: Pabellón de Pica / Chanabaya / Iquique, Provinz / Tarapacá, Region (I. Region) / Chile
Dittmarit
Views (File:
1702753495
): 57
Dittmarit
Dittmarit (ohne Maßstab) von der TL Skipton Caves, Mount Widderin, Corangamite Shire, Victoria, Australien. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: Australien/Victoria/Corangamite Shire/Skipton/Mt. Widderin/Skipton Caves
Mineral: Dittmarite
Image: 1702753495
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Dittmarit

Dittmarit (ohne Maßstab) von der TL Skipton Caves, Mount Widderin, Corangamite Shire, Victoria, Australien. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).
Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2023-12-16
Locality: Skipton Caves / Mt. Widderin / Skipton / Corangamite Shire / Victoria / Australien

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 5
Solubility +++ Säuren
Crystal System orthorhombisch, Pmn21

Chemism

Chemical formula

(NH4)Mg(PO4)·H2O

Chemical composition

Magnesium, Phosphor, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 155.3303732 u; Number of atoms in the formula: 14

Info

Empirical formula:

(NH4)Mg(PO4)·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.89

6

42.86

1.0079470

6.0476820
Nitrogen

N

9.02

1

7.14

14.0067200

14.0067200
Oxygen

O

51.50

5

35.71

15.9994300

79.9971500
Magnesium

Mg

15.65

1

7.14

24.3050600

24.3050600
Phosphorus

P

19.94

1

7.14

30.9737612

30.9737612

Strunz 9th edition incl. updates

8.CH.20

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
H: Mit großen und mittelgroßen Kationen, RO4:H2O < 1:1
20:Dittmarit-Gruppe

Lapis Classification

VII/C.23-020

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
23: Mittelgroße und große Kationen: Fe-Mn-Zn-Mg und Ca-(NH4) 1+

Classification by Hölzel

8.CD.630

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
D: Phosphates, Valency: 1,2 for large, 2 for medsized Cations
6: With NH4+ Dittmarite-Group

Dana 8th edition

40.01.02.01

40: Hydrated Phosphates, etc
01: Hydrated Phosphates, etc where A++ B++ (XO4) · x(H2O)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.022
Birefringence chart\! Dittmarite title=Birefringence chart Dittmarite

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

1.549

RI value β

1.569

RI value γ / ε

1.571

Ri mean

1.563

2V angle

Biaxial (-) 40°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

31

Space Group

Pmn21

Cell parameters a (Å)

5.613

Cell parameters b (Å)

8.767

Cell parameters c (Å)

4.791

Cell parameters a/b or c/a

0.640

Cell parameters c/b

0.546

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

235.761

X-Ray Powder Diffraction

8.77(100),
4.72(30),
4.20(20),
2.92(40),
2.80(50),
2.50(20),
2.28(10),
2.12(10)
XRD chart Dittmarite

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

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.19 (berechnet)

2.188 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Australien/Victoria/Corangamite Shire/Skipton/Mt. Widderin/Skipton Caves

Preface

Author (Name, Year)

MacIvor, 1887

References

Handbook of Mineralogy (Anthony et al.), 4 2000), 142

Other languages

German

Dittmarit

Spanish

Dittmarita

English

Dittmarite

French

Dittmarite

Russian

Диттмарит

CNMNC symbol

Symbol

Dmr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) sc0F5lyeK0STAELJfglCzA
GUID (Global unique identifier) E605CDB1-9E5C-442B-9300-42C97E0942CC
Database ID 944