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Rivadavite

Pictures (2 Images total)

Rivadavit
Views (File:
1484235823
): 472
Rivadavit
Größe: 14,1 x 10,7 x 6,5 cm; Fundort: Tincalayu Mine, Salar Del Hombre Muerto, Provinz Salta, Argentinien; Ex Steve Pullman Collection
Copyright: Walter Kellogg; Contribution: slugslayer
Location: Argentinien/Catamarca, Provinz/Antofagasta de la Sierra, Departamento/Salar del Hombre Muerto/Tincalayu Mine
Mineral: Rivadavite
Image: 1484235823
License: Usage for Mineralienatlas project only
Rivadavit

Größe: 14,1 x 10,7 x 6,5 cm; Fundort: Tincalayu Mine, Salar Del Hombre Muerto, Provinz Salta, Argentinien; Ex Steve Pullman Collection

Copyright: Walter Kellogg
Contribution: slugslayer 2017-01-12
Locality: Tincalayu Mine / Salar del Hombre Muerto / Antofagasta de la Sierra, Departamento / Catamarca, Provinz / Argentinien
Rivadavit
Views (File:
1484342865
): 388
Rivadavit
Größe: 28x28x17 mm; Fundort: Tincalayu Mine, Salar Del Hombre Muerto, Provinz Salta, Argentinien
Copyright: Leonardus; Contribution: slugslayer
Location: Argentinien/Catamarca, Provinz/Antofagasta de la Sierra, Departamento/Salar del Hombre Muerto/Tincalayu Mine
Mineral: Rivadavite
Image: 1484342865
License: Usage for Mineralienatlas project only
Rivadavit

Größe: 28x28x17 mm; Fundort: Tincalayu Mine, Salar Del Hombre Muerto, Provinz Salta, Argentinien

Copyright: Leonardus
Contribution: slugslayer 2017-01-13
Locality: Tincalayu Mine / Salar del Hombre Muerto / Antofagasta de la Sierra, Departamento / Catamarca, Provinz / Argentinien

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 3.5
Solubility +++ H2O
Crystal System monoklin, P21/c

Chemism

Chemical formula

Na6MgB24O40·22H2O

Chemical composition

Magnesium, Natrium, Bor, Sauerstoff, Wasserstoff

Unit weight: 1458.0388092 u; Number of atoms in the formula: 137

Info

Empirical formula:

Na6MgB24O40·22H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.04

44

32.12

1.0079470

44.3496680

Boron

B

17.80

24

17.52

10.8117000

259.4808000

Oxygen

O

68.03

62

45.26

15.9994300

991.9646600

Sodium

Na

9.46

6

4.38

22.9897702

137.9386212

Magnesium

Mg

1.67

1

0.73

24.3050600

24.3050600

Analysis wt%

Na2O : 12.70, MgO : 2.70, B2O3 : 58.20, H2O : 26.70

Strunz 9th edition incl. updates

6.FA.20

6: Borate
F: Hexaborate
A: Insel(Neso)-Hexaborate
20:Rivadavit-Gruppe

Lapis Classification

V/H.17-040

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

Classification by Hölzel

6.FA.160

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

Dana 8th edition

26.06.01.01

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

farblos

Streak color

weiß

max. Birefringence

0.027

Birefringence chart\! Rivadavite title=Birefringence chart Rivadavite

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

1.470

RI value β

1.481

RI value γ / ε

1.497

Ri mean

1.483

2V angle

Biaxial (+) 80°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

14.779

Cell parameters b (Å)

8.010

Cell parameters c (Å)

11.128

Cell parameters a/b or c/a

1.845

Cell parameters c/b

1.389

Cell parameters α

90°

Cell parameters β

105.95

Cell parameters γ

90°

Z

1

Volume (ų)

1266.616

X-Ray Powder Diffraction

14.2(100),
7.59(100),
6.23(50),
5.340(50),
4.740(50),
3.246(60),
2.950(70),
2.849(50)

XRD chart Rivadavite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.905 (gemessen)

1.911 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Hurlbut & Aristarain, 1967

References

Naturwissenschaften 60 (1973), 350

Other languages

German

Rivadavit

Spanish

Rivadavita

French

Rivadavite

English

Rivadavite

CNMNC (IMA)-Number

IMA 1966-010

CNMNC symbol

Symbol

Riv

IDs

GUSID (Global unique identifier short form) qjfK9v8s2UySa9Qvem4gig
GUID (Global unique identifier) F6CA37AA-2CFF-4CD9-926B-D42F7A6E208A
Database ID 3284