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Bararite

Pictures (1 Images total)

Bararit mit Kryptohalit
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Bararit mit Kryptohalit
Weiße Kruste aus Bararit und Kryptohalit mit winzigen, rundlichen Kriställchen von ged. Schwefel. Fundort: Burnside, Northumberland Co., Pennsylvania, USA. Bildbreite ca. 7 mm.
Copyright: Yi Sun; Contribution: sun-mineral
Collection: Yi Sun
Location: USA/Pennsylvania/Northumberland Co./Burnside
Mineral: Bararite
Image: 1566912617
License: Usage for Mineralienatlas project only
Bararit mit Kryptohalit

Weiße Kruste aus Bararit und Kryptohalit mit winzigen, rundlichen Kriställchen von ged. Schwefel. Fundort: Burnside, Northumberland Co., Pennsylvania, USA. Bildbreite ca. 7 mm.

Collection: Yi Sun
Copyright: Yi Sun
Contribution: sun-mineral 2019-08-27
Locality: Burnside / Northumberland Co. / Pennsylvania / USA

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ H2O
Crystal System trigonal, P3m1

Chemism

Chemical formula

(NH4)2SiF6

Chemical composition

Silicium, Fluor, Stickstoff, Wasserstoff

Unit weight: 178.1529655 u; Number of atoms in the formula: 17

Info

Empirical formula:

(NH4)2SiF6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.53

8

47.06

1.0079470

8.0635760

Nitrogen

N

15.72

2

11.76

14.0067200

28.0134400

Fluorine

F

63.98

6

35.29

18.9984033

113.9904195

Silicon

Si

15.76

1

5.88

28.0855300

28.0855300

Strunz 9th edition incl. updates

3.CH.10

3: Halide (Fluoride, Chloride, Bromide, Iodide)
C: Komplexe Halogenide
H: Silicofluoride
10:Bararit-Gruppe

Lapis Classification

III/B.02-040

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
B: Doppelhalogenide
2: mit [BF4] 1-, [SiF6] 2- und [AlF6] 3-

Classification by Hölzel

3.DC.250

3: HALIDES
D: Complex Halides
C: Boro und Silico-Fluorides
2: Silico-Fluoride-Group

Dana 8th edition

11.05.02.02

11: Halide Complexes; Alumino-fluorides
05: Halide Complexes; Alumino-fluorides where (A)m B (X)6
02: Malladrite Group

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.015

Birefringence chart\! Bararite title=Birefringence chart Bararite

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

1.406

RI value γ / ε

1.391

Ri mean

1.401

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell parameters a (Å)

5.77

Cell parameters b (Å)

-

Cell parameters c (Å)

4.78

Cell parameters a/b or c/a

0.828

Cell parameters c/b

-

Z

1

Volume (ų)

137.819

X-Ray Powder Diffraction

4.99(100),
4.77(20),
3.447(30),
2.385(10),
2.210(40),
1.753(10),
1.724(10),
1.479(10)

XRD chart Bararite

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)

2.152

2.146 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Scacci, 1873

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: H301: Giftig bei Verschlucken., H311: Giftig bei Hautkontakt., H331: Giftig bei Einatmen., P261: Einatmen von Staub / Rauch / Gas / Nebel / Dampf / Aerosol vermeiden., P280: Schutzhandschuhe / Schutzkleidung / Augenschutz / Gesichtsschutz tragen., P301+P310: Bei Verschlucken: Sofort Giftinformationszentrum, Arzt oder … anrufen., P311: Giftinformationszentrum, Arzt oder … anrufen.

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 37

Other languages

German

Bararit

Spanish

Bararita

English

Bararite

French

Bararite

Russian

Барарит

CNMNC symbol

Symbol

Brr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) yMBllhRddkuB-iHMpPJARA
GUID (Global unique identifier) 9665C0C8-5D14-4B76-81FA-21CCA4F24044
Database ID 282