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Sulfoborite (Sulfoborit)

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Sulfoborit x
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Sulfoborit x
Westeregeln bei Staßfurt/Sachsen-Anhalt;historischer Fund mit Etikett von Luigi Bardelli(1869-1905); Kristallgröße ca.3 mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Deutschland/Sachsen-Anhalt/Salzlandkreis/Börde-Hakel/Westeregeln
Mineral: Sulfoborite
Image: 1514996905
License: Usage for Mineralienatlas project only
Sulfoborit x

Westeregeln bei Staßfurt/Sachsen-Anhalt;historischer Fund mit Etikett von Luigi Bardelli(1869-1905); Kristallgröße ca.3 mm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2018-01-03
Locality: Westeregeln / Börde-Hakel / Salzlandkreis / Sachsen-Anhalt / Deutschland

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 4.00 - 4.50
Solubility +++ Säuren, wird durch H2O zersetzt
Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

Mg3B2(SO4)(OH)8(OH,F)2

Chemical composition

Magnesium, Bor, Fluor, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 361.671083125 u; Number of atoms in the formula: 29.5

Info

Empirical formula:

Mg3B2(SO4)(OH)8((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.65

9.5

32.20

1.0079470

9.5754965

Boron

B

5.98

2

6.78

10.8117000

21.6234000

Oxygen

O

59.72

13.5

45.76

15.9994300

215.9923050

Fluorine

F

2.63

0.5

1.69

18.9984033

9.4992016

Magnesium

Mg

20.16

3

10.17

24.3050600

72.9151800

Sulfur

S

8.87

1

3.39

32.0655000

32.0655000

Analysis wt%

MgO : 30.87, CaO : 1.86, B2O3 : 22.24, SO3 : 19.69, F : 4.70, H2O : 20.10 (Ref: Doklady Akademiia Nauk, SSSR 58)

Strunz 9th edition incl. updates

6.AC.55

6: Borate
A: Monoborate
C: B(O,OH)4, ohne und mit zusätzlichen [Anionen]; 1(T), 1(T)+OH, etc.
55:Sulfoborit-Gruppe

Lapis Classification

V/G.11-010

V: NITRATE, CARBONATE UND BORATE
G: Inselborate
11: [BO4] 5-- und [B(OH)4] 1--Tetraeder

Classification by Hölzel

6.AC.400

6: Borates
A: Monoborates
C:
4: Moydite-Cahnite-Group (with CO3, SO4, PO4, AsO4 - heterotypes)

Dana 8th edition

27.01.05.01

27: Compound Borates
01: Compound Borates

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.024

Birefringence chart\! Sulfoborite title=Birefringence chart Sulfoborite

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

1.527

RI value β

1.536

RI value γ / ε

1.551

Ri mean

1.538

2V angle

Biaxial (-) 80°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

10.132

Cell parameters b (Å)

12.537

Cell parameters c (Å)

7.775

Cell parameters a/b or c/a

0.808

Cell parameters c/b

0.620

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

987.618

X-Ray Powder Diffraction

5.55(40),
3.47(100),
3.13(80),
3.09(100),
2.973(70),
2.425(50),
2.050(100),
1.903(90)

XRD chart Sulfoborite

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)

4.00 - 4.50

VHN (Hardness Vickers)

230 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.44 (gemessen)

2.432 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren, wird durch H2O zersetzt

Preface

Author (Name, Year)

Naupert & Wense, 1893

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 674

Other languages

German

Sulfoborit

Spanish

Sulfoborita

English

Sulfoborite

French

Sulfoborite

Russian

Сульфоборит

Simplified Chinese

硫硼镁石

Alternative Name

Sulphoborit

Spanish

Sulphoborita

Sulphoborite

CNMNC symbol

Symbol

Sbo

Locations with GPS information