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Legrandite

Pictures (44 Images total)

Legrandit
Views (File:
1196090805
): 4777, Rating: 8.82
Legrandit
Fundort: Ojuela Mine, Mapimi, Durango, Mexiko; Bildbreite: 8 mm
Copyright: Christian Rewitzer; Contribution: Klinoklas
Location: Mexiko/Durango/Mapimí, Municipio/Mapimí/Ojuela Mine
Mineral: Legrandite
Image: 1196090805
Rating: 8.82 (votes: 11)
License: Usage for Mineralienatlas project only
Legrandit

Fundort: Ojuela Mine, Mapimi, Durango, Mexiko; Bildbreite: 8 mm
Copyright: Christian Rewitzer
Contribution: Klinoklas 2007-11-26
Locality: Ojuela Mine / Mapimí / Mapimí, Municipio / Durango / Mexiko
Legrandit
Views (File:
1314862927
): 2120
Legrandit
Größe: 3,4 mm; Fundort: Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexiko
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Mexiko/Durango/Mapimí, Municipio/Mapimí/Ojuela Mine
Mineral: Legrandite
Image: 1314862927
Rating: 9.33 (votes: 3)
License: Usage for Mineralienatlas project only
Legrandit

Größe: 3,4 mm; Fundort: Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexiko
Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-01
Locality: Ojuela Mine / Mapimí / Mapimí, Municipio / Durango / Mexiko
Legrandit
Views (File:
1387827558
): 1684
Legrandit
Langprismatische gelbe Kristalle, BB = 6 mm, Fundort: Ojuela Mine, Mapimi, Durango, Mexiko.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A009664, Donator: Manfred Seitz
Location: Mexiko/Durango/Mapimí, Municipio/Mapimí/Ojuela Mine
Mineral: Legrandite
Image: 1387827558
Rating: 9.33 (votes: 3)
License: Usage for Mineralienatlas project only
Legrandit (SNr: A009664)

Langprismatische gelbe Kristalle, BB = 6 mm, Fundort: Ojuela Mine, Mapimi, Durango, Mexiko.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2013-12-23
Locality: Ojuela Mine / Mapimí / Mapimí, Municipio / Durango / Mexiko
Legrandit
Views (File:
1394541248
): 1340
Legrandit
Bildbreite: 8 mm; Fundort: Flor de Peña Mine, Mun. de Lampazos de Naranjo, Nuevo Leon, Mexiko
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Mexiko/Nuevo León/Lampazos de Naranjo, Municipio/Lampazos de Naranjo (Lampazos)/Flor de Peña Mine
Mineral: Legrandite
Image: 1394541248
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Legrandit

Bildbreite: 8 mm; Fundort: Flor de Peña Mine, Mun. de Lampazos de Naranjo, Nuevo Leon, Mexiko
Copyright: Stephan Wolfsried
Contribution: Hg 2014-03-11
Locality: Flor de Peña Mine / Lampazos de Naranjo (Lampazos) / Lampazos de Naranjo, Municipio / Nuevo León / Mexiko
Legrandit
Views (File:
1258127396
): 2754, Rating: 8.3
Legrandit
Bildbreite: ca. 3 cm, Fundort: Flor de Peña Mine, Mun. de Lampazos de Naranjo, Nuevo Leon, Mexiko.
Copyright: Fabre Minerals; Contribution: thdun5
Location: Mexiko/Nuevo León/Lampazos de Naranjo, Municipio/Lampazos de Naranjo (Lampazos)/Flor de Peña Mine
Mineral: Legrandite
Image: 1258127396
Rating: 8.3 (votes: 10)
License: Usage for Mineralienatlas project only
Legrandit

Bildbreite: ca. 3 cm, Fundort: Flor de Peña Mine, Mun. de Lampazos de Naranjo, Nuevo Leon, Mexiko.
Copyright: Fabre Minerals
Contribution: thdun5 2009-11-13
Locality: Flor de Peña Mine / Lampazos de Naranjo (Lampazos) / Lampazos de Naranjo, Municipio / Nuevo León / Mexiko

You find additional specimen at the Geolitho Museum

Collectors Summary

Color gelb, gelblich-orange
Streak color weiß
Hardness (Mohs) 4.5
Solubility +++ Säuren
Crystal System monoklin, P21/c

Chemism

Chemical formula

Zn2(AsO4)(OH)·H2O

Chemical composition

Arsen, Zink, Sauerstoff, Wasserstoff

Unit weight: 304.760823 u; Number of atoms in the formula: 12

Info

Empirical formula:

Zn2(AsO4)(OH)·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.99

3

25.00

1.0079470

3.0238410
Oxygen

O

31.50

6

50.00

15.9994300

95.9965800
Zinc

Zn

42.93

2

16.67

65.4094000

130.8188000
Arsenic

As

24.58

1

8.33

74.9216020

74.9216020

Analysis wt%

ZnO : 46.68, Fe2O3 : 2.14, As2O5 : 42.02, H2O : 9.36 (Ref: Mineralogical Magazine 32)

Strunz 9th edition incl. updates

8.DC.10

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
C: Mit ausschließlich mittelgroßen [Kationen], (OH, etc.):RO4 = 1:1 und < 2:1
10:Legrandit-Gruppe

Lapis Classification

VII/D.07-050

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
7: Mittelgroße Kationen: Cu-Zn-Mn-Al-Fe

Classification by Hölzel

8.DB.100

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
B: Valency: 2, C medium

Dana 8th edition

42.06.04.01

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
06: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)2 (XO4) Zq · x(H2O)
04: Strashimirite Group

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelb, gelblich-orange

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.038
Birefringence chart\! Legrandite title=Birefringence chart Legrandite

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

1.702

RI value β

1.709

RI value γ / ε

1.740

Ri mean

1.717

2V angle

Biaxial (+) 50°

Optical Data Luminescence

Color LW-UV (365nm)

  

grün

LW-UV Observation Frequency

sehr selten

Color SW-UV (254nm)

  

grün

SW-UV Observation Frequency

sehr selten

Most Common Activator

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

12.80

Cell parameters b (Å)

7.94

Cell parameters c (Å)

10.22

Cell parameters a/b or c/a

1.612

Cell parameters c/b

1.287

Cell parameters α

90°

Cell parameters β

104.20

Cell parameters γ

90°

Z

8

Volume (ų)

1006.943

Crystal structure

Frank C. Hawthorne, Yassir A. Abdu, Kimberly T. Tait: Hydrogen bonding in the crystal structure of legrandite: Zn2(AsO4)(OH)(H2O). Can Mineral Vol. 51, Nr. 2 (2013) S. 233-241.

X-Ray Powder Diffraction

6.68(70),
5.93(70),
4.19(50),
4.08(100),
3.09(70),
3.03(30),
2.98(30),
2.62(30)
XRD chart Legrandite

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)

4

4.02 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Mexiko/Nuevo León/Lampazos de Naranjo, Municipio/Lampazos de Naranjo (Lampazos)/Flor de Peña Mine

Type material

British Museum Natural History, London; BM 1932,131. Harvard Mineralogical Museum, Cambridge, MA; MGMH #92567. Smithsonian Institution, Washington; NMNH #114810. Königliches Belgisches Institut für Naturwissenschaften, Brüssel; RBINS #Z1386.

Paragenesis of type material

Zinkblende

Preface

Name from

Louis C.A. Legrand, geb. 30.7.1861 in Lüttich, Belgien; verstorben 27.5.1920; tätig als Bergbauingenieur, u.a. in Mexiko. J. Drugman hat aus seinem Nachlass die Typstufe von Legrandit erworben. Einzelheiten in Wouter I. Van Tichelen: Legrandite and Mr. Legrand: the mystery unraveled. Mineralogical Record Jhrg. 47, Nr. 5 (2016) S. 633-639.

Author (Name, Year)

Drugman, J., Hey, M.H.: Legrandite, a new zinc arsenate. Mineralogical Magazine Vol. 23 (1932) S. 175-178.

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 308

Other languages

Dutch

Legrandiet

German

Legrandit

Spanish

Legrandita

French

Legrandite

English

Legrandite

Russian

Леграндит

Simplified Chinese

水羟砷锌石

CNMNC symbol

Symbol

Leg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) yDK-NIzRzkSKBrzVANpfxg
GUID (Global unique identifier) 34BE32C8-D18C-44CE-8A06-BCD500DA5FC6
Database ID 2168