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Halurgite

Additional Functions

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 2.50 - 3.00
Solubility +++ Säuren, heißes H2O, + kaltes H2O
Crystal System monoklin,

Chemism

Chemical formula

Mg2[B4O5(OH)4]2·H2O

Chemical composition

Magnesium, Bor, Sauerstoff, Wasserstoff

Unit weight: 449.17236 u; Number of atoms in the formula: 39

Info

Empirical formula:

Mg2[B4O5(OH)4]2·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.24

10

25.64

1.0079470

10.0794700

Boron

B

19.26

8

20.51

10.8117000

86.4936000

Oxygen

O

67.68

19

48.72

15.9994300

303.9891700

Magnesium

Mg

10.82

2

5.13

24.3050600

48.6101200

Analysis wt%

B2O3 : 61.90, MgO : 17.80, H2O : 19.80 (Ref: Doklady Akademiia Nauk, SSSR 62)

Strunz 9th edition incl. updates

6.HA.35

6: Borate
H: Unklassifizierte Borate
A: Untergruppe nicht spezifiziert
35:Halurgit-Gruppe

Lapis Classification

V/H.12-010

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
12: Planare und tetraedrische Gruppen [B3O5] 1- bis [B6O10] 2-

Classification by Hölzel

6.DC.100

6: Borates
D: Tetraborates
C: Phyllotetraborates
1: Structures unknown

Dana 8th edition

26.04.04.01

26: Hydrated Borates Containing Hydroxyl or Halogen
04: Hydrated Borates Containing Hydroxyl or Halogen

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.040

Birefringence chart\! Halurgite title=Birefringence chart Halurgite

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

1.532

RI value β

1.545

RI value γ / ε

1.572

Ri mean

1.550

2V angle

Biaxial (+) 70°

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

13.25

Cell parameters b (Å)

7.60

Cell parameters c (Å)

13.20

Cell parameters a/b or c/a

1.743

Cell parameters c/b

1.737

Cell parameters α

90°

Cell parameters β

92.15

Cell parameters γ

90°

Z

4

Volume (ų)

1328.304

X-Ray Powder Diffraction

7.20(50),
6.76(50),
4.81(90),
3.87(100),
3.57(60),
3.29(100),
2.643(70),
2.163(90)

XRD chart Halurgite

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

Physical Properties

Hardness (Mohs)

2.50 - 3.00

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.19 (gemessen)

2.246 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren, heißes H2O, + kaltes H2O

Preface

Author (Name, Year)

Lobanova, 1962

References

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections 143 (1962), 91

Doklady Akademii Nauk SSSR 143 (1962), 693

Kristallografiya 9 (1964), 735

Other languages

German

Halurgit

Spanish

Halurgita

French

Halurgite

English

Halurgite

Russian

Галургит

Alternative Name

Russian

Галургинт

CNMNC symbol

Symbol

Hlg

IDs

GUSID (Global unique identifier short form) mTAyn0ug3k-w2F7mfGpP4g
GUID (Global unique identifier) 9F323099-A04B-4FDE-B0D8-5EE67C6A4FE2
Database ID 1508