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Hydrochlorborite (Hydrochlorborit)

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Hydrochlorborit
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Hydrochlorborit
tafliger Hydrochlorborit auf schwarzem Trägermaterial, Salar de Carcote, Ollagüe, El Loa Provinz, Antofagasta Region, Chile; BB ~ 3 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Chile/Antofagasta, Region (II. Region)/El Loa, Provinz
Mineral: Hydrochlorborite
Image: 1586175559
License: Usage for Mineralienatlas project only
Hydrochlorborit

tafliger Hydrochlorborit auf schwarzem Trägermaterial, Salar de Carcote, Ollagüe, El Loa Provinz, Antofagasta Region, Chile; BB 3 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-06
Locality: El Loa, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 3
Solubility ++ H2O
Crystal System monoklin, I2/a

Chemism

Chemical formula

Ca2B4O4(OH)7Cl·7H2O

Chemical composition

Calcium, Chlor, Bor, Sauerstoff, Wasserstoff

Unit weight: 468.013427 u; Number of atoms in the formula: 46

Info

Empirical formula:

Ca2B4O4(OH)7Cl·7H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.52

21

45.65

1.0079470

21.1668870

Boron

B

9.24

4

8.70

10.8117000

43.2468000

Oxygen

O

61.53

18

39.13

15.9994300

287.9897400

Chlorine

Cl

7.58

1

2.17

35.4532000

35.4532000

Calcium

Ca

17.13

2

4.35

40.0784000

80.1568000

Analysis wt%

CaO : 24.00, B2O3 : 29.20, Cl : 7.20, H2O : 41.50 (Ref: American Mineralogist 77)

Strunz 9th edition incl. updates

6.DA.30

6: Borate
D: Tetraborate
A: Insel(Neso)-Tetraborate
30:Hydrochlorborit-Gruppe

Lapis Classification

V/H.07-010

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

Classification by Hölzel

6.CA.300

6: Borates
C: Triborates
A: Nesotriborates
3: Hydrochlorborite-Group - 3(P+2T)+T (branched unit)

Dana 8th edition

26.03.04.01

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

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\! Hydrochlorborite title=Birefringence chart Hydrochlorborite

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

1.499

RI value β

1.502

RI value γ / ε

1.521

Ri mean

1.507

2V angle

Biaxial (+) 45°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

I2/a

Cell parameters a (Å)

22.783

Cell parameters b (Å)

8.745

Cell parameters c (Å)

17.066

Cell parameters a/b or c/a

2.605

Cell parameters c/b

1.952

Cell parameters α

90°

Cell parameters β

96.42

Cell parameters γ

90°

Z

8

Volumne (ų)

3378.862

X-Ray Powder Diffraction

8.48(100),
8.18(10),
6.01(20),
3.824(10),
3.703(10),
3.604(10),
2.825(10),
2.798(10)

XRD chart Hydrochlorborite

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)

3

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.852 (gemessen)

1.84 ( ρ calc. Mineralienatlas )

Instability

++ H2O

(Co-)Type locality

(Co-)Type locality

China/Tibet (Xizang AR)/Qinghai Plateau

Preface

Author (Name, Year)

Chien & Chen, 1965

References

American Mineralogist 62 (1977), 147

Other languages

Spanish

Hidrocloroborita

German

Hydrochlorborit

French

Hydrochlorborite

English

Hydrochlorborite

Russian

Гидрохлорборит

Alternative Name

Spanish

Hydrochlorborita

CNMNC symbol

Symbol

Hcb