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Hydrohalite

Collectors Summary

Color farblos, weiß
Streak color weiß
Solubility +++ H2O, stabil unter - 5°C
Crystal System monoklin, P21/c

Chemism

Chemical formula

NaCl·2H2O

Chemical composition

Chlor, Natrium, Sauerstoff, Wasserstoff

Unit weight: 94.4736182 u; Number of atoms in the formula: 8

Info

Empirical formula:

NaCl·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.27

4

50.00

1.0079470

4.0317880

Oxygen

O

33.87

2

25.00

15.9994300

31.9988600

Sodium

Na

24.33

1

12.50

22.9897702

22.9897702

Chlorine

Cl

37.53

1

12.50

35.4532000

35.4532000

Strunz 9th edition incl. updates

3.BA.05

3: Halide (Fluoride, Chloride, Bromide, Iodide)
B: Einfache Halogenide mit H2O
A: M:X = 1:1 und 2:3
05:Hydrohalit-Gruppe

Lapis Classification

III/A.12-010

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
A: Einfache Halogenide
12: Wasserhaltig, Metall : Halogen = 1:1 bis 1:3

Classification by Hölzel

3.BA.100

3: HALIDES
B: Simple Halides with H2O
A: Me/X=1/1

Dana 8th edition

09.01.02.01

09: Halide Minerals
01: Anhydrous and Hydrated Halides where A X

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

2V angle

Biaxial

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

6.331

Cell parameters b (Å)

10.118

Cell parameters c (Å)

6.503

Cell parameters a/b or c/a

0.626

Cell parameters c/b

0.643

Cell parameters α

90°

Cell parameters β

114.40

Cell parameters γ

90°

Z

4

Volume (ų)

379.357

X-Ray Powder Diffraction

3.87(80),
3.82(90),
3.63(50),
2.98(100),
2.88(60),
2.67(100),
2.52(100),
2.24(90)

XRD chart Hydrohalite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

1.63 (gemessen)

1.654 ( ρ calc. Mineralienatlas )

Instability

+++ H2O, stabil unter - 5°C

Preface

Author (Name, Year)

Hausmann, 1847

Additional Information

stabil nur bei Temperaturen unter -1° C

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 256

Other languages

Spanish

Hidrohalita

German

Hydrohalit

French

Hydrohalite

English

Hydrohalite

Russian

Гидрогалит

Alternative Name

Bihydrate

Spanish

Hydrohalita

Natriumchloridhydrat

CNMNC symbol

Symbol

Hhl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) tSfxgGmTD0OSRRUlZfgYow
GUID (Global unique identifier) 80F127B5-9369-430F-9245-152565F818A3
Database ID 1666