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Wardsmithite

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Wardsmithit
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Wardsmithit
farblose Nadeln von Wardsmithit, Hard Scramble Claim, Black Mountains, Death Valley NP, Kalifornien, USA; BB ~ 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Kalifornien (California)/Inyo Co./Death Valley National Park/Furnace Creek District/Black Mts/Hard Scramble Claim
Mineral: Wardsmithite
Image: 1575648961
License: Usage for Mineralienatlas project only
Wardsmithit

farblose Nadeln von Wardsmithit, Hard Scramble Claim, Black Mountains, Death Valley NP, Kalifornien, USA; BB 1 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-12-06
Locality: Hard Scramble Claim / Black Mts / Furnace Creek District / Death Valley National Park / Inyo Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ Säuren, + H2O
Crystal System hexagonal,

Chemism

Chemical formula

Ca5MgB24O42·30H2O

Chemical composition

Calcium, Magnesium, Bor, Sauerstoff, Wasserstoff

Unit weight: 1696.61364 u; Number of atoms in the formula: 162

Info

Empirical formula:

Ca5MgB24O42·30H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.56

60

37.04

1.0079470

60.4768200

Boron

B

15.29

24

14.81

10.8117000

259.4808000

Oxygen

O

67.90

72

44.44

15.9994300

1,151.9589600

Magnesium

Mg

1.43

1

0.62

24.3050600

24.3050600

Calcium

Ca

11.81

5

3.09

40.0784000

200.3920000

Analysis wt%

MgO : 2.26, CaO : 16.50, B2O3 : 48.58, H2O : 32.44 (Ref: American Mineralogist 70)

Strunz 9th edition incl. updates

6.HA.25

6: Borate
H: Unklassifizierte Borate
A: Untergruppe nicht spezifiziert
25:Wardsmithit-Gruppe

Lapis Classification

V/H.12-030

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

Classification by Hölzel

6.FC.520

6: Borates
F: Hexaborates
C: Phyllohexaborates
5: Unclassified

Dana 8th edition

26.07.07.01

26: Hydrated Borates Containing Hydroxyl or Halogen
07: 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

0.014

Birefringence chart\! Wardsmithite title=Birefringence chart Wardsmithite

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

1.490

RI value γ / ε

1.476

Ri mean

1.485

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Cell parameters b (Å)

-

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

X-Ray Powder Diffraction

13.5(100),
12.3(60),
6.73(20),
6.12(50),
4.721(40),
4.162(20),
3.358(50),
2.744(30)

XRD chart Wardsmithite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.88 (gemessen)

Instability

+++ Säuren, + H2O

Preface

Name from

Ward Cromwell Smith (06.02.1906 - 25.06.1998), US-amerikanischer Geologe, der sich mit Boraten befasst hat

Author (Name, Year)

Erd & McAllister & Vlisidis, 1970

References

American Mineralogist 55 (1970), 349

Other languages

German

Wardsmithit

Spanish

Wardsmithita

French

Wardsmithite

English

Wardsmithite

CNMNC (IMA)-Number

IMA 1967-030

CNMNC symbol

Symbol

Wsm

IDs

GUSID (Global unique identifier short form) XNRJjbvHd0ukyXmD2QupSw
GUID (Global unique identifier) 8D49D45C-C7BB-4B77-A4C9-7983D90BA94B
Database ID 4123