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Aksaite (Aksait)

Pictures (1 Images total)

Aksait
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Aksait
weiße Aggregate von Aksait, Chelkar Salzlagerstätte, Aksai, Aqtöbe, Kasachstan; BB ~ 1 cm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Kasachstan/Aqtöbe, Gebiet (Aqtöbe oblysy)/Aksai/Chelkar Salzdom
Mineral: Aksaite
Image: 1583425385
License: Usage for Mineralienatlas project only
Aksait

weiße Aggregate von Aksait, Chelkar Salzlagerstätte, Aksai, Aqtöbe, Kasachstan; BB 1 cm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-05
Locality: Chelkar Salzdom / Aksai / Aqtöbe, Gebiet (Aqtöbe oblysy) / Kasachstan

Collectors Summary

Color hellgrau
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ HCl, - H2O
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

MgB6O7(OH)6·2H2O

Chemical composition

Magnesium, Bor, Sauerstoff, Wasserstoff

Unit weight: 339.24618 u; Number of atoms in the formula: 32

Info

Empirical formula:

MgB6O7(OH)6·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.97

10

31.25

1.0079470

10.0794700
Boron

B

19.12

6

18.75

10.8117000

64.8702000
Oxygen

O

70.74

15

46.88

15.9994300

239.9914500
Magnesium

Mg

7.16

1

3.13

24.3050600

24.3050600

Analysis wt%

B2O3 : 61.56, MgO : 11.88, H2O : 26.55 (Ref: berechnet)

Strunz 9th edition incl. updates

6.FA.05

6: Borate
F: Hexaborate
A: Insel(Neso)-Hexaborate
05:Aksait-Gruppe

Lapis Classification

V/H.17-030

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

Classification by Hölzel

6.FA.100

6: Borates
F: Hexaborates
A: Nesohexaborates
1: Aksaite-Group - 6(3P+3T)

Dana 8th edition

26.06.04.01

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

hellgrau

Streak color

weiß

max. Birefringence

0.054
Birefringence chart\! Aksaite title=Birefringence chart Aksaite

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

1.472

RI value β

1.503

RI value γ / ε

1.526

Ri mean

1.500

2V angle

Biaxial (-) 80°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

12.54

Cell parameters b (Å)

24.35

Cell parameters c (Å)

7.484

Cell parameters a/b or c/a

0.515

Cell parameters c/b

0.307

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volumne (ų)

2285.232

X-Ray Powder Diffraction

6.4(100),
6.3(30),
6.1(50),
4.72(50),
4.37(20),
3.59(30),
3.19(50),
3.11(50)
XRD chart Aksaite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.99 (gemessen)

1.972 ( ρ calc. Mineralienatlas )

Instability

+++ HCl, - H2O

(Co-)Type locality

(Co-)Type locality

Kasachstan/Aqtöbe, Gebiet (Aqtöbe oblysy)/Aksai/Chelkar Salzdom

Preface

Author (Name, Year)

Blazko & Kondrat'eva & Yarzhemskiy, 1962

References

American Mineralogist 48 (1963), 930

Other languages

German

Aksait

English

Aksaite

French

Aksaite

Spanish

Aksaíta

Russian

Аксаит

CNMNC symbol

Symbol

Aks