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Meyerhofferite

Pictures (14 Images total)

Meyerhofferit
Views (File:
1322169354
): 739
Meyerhofferit
Größe: 40x27 mm; Fundort: Mount Blanco Mine, Black Mts, Furnace Creek, Death Valley, Inyo Co., Kalifornien, USA
Copyright: Rock Currier; Contribution: Philip Blümner
Collection: Jim Minette
Location: USA/Kalifornien (California)/Inyo County/Death Valley National Park/Furnace Creek District/Black Mts/Mount Blanco Mine
Mineral: Meyerhofferite
Image: 1322169354
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Meyerhofferit

Größe: 40x27 mm; Fundort: Mount Blanco Mine, Black Mts, Furnace Creek, Death Valley, Inyo Co., Kalifornien, USA
Collection: Jim Minette
Copyright: Rock Currier
Contribution: Philip Blümner 2011-11-24
Locality: Mount Blanco Mine / Black Mts / Furnace Creek District / Death Valley National Park / Inyo County / Kalifornien (California) / USA
Meyerhofferit
Views (File:
1166000585
): 1407
Meyerhofferit
Bildbreite: 4 mm; Fundort Mount Blanco mine, Black Mts, Furnace Creek, Death Valley, Inyo Co., California, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/Kalifornien (California)/Inyo County/Death Valley National Park/Furnace Creek District/Black Mts/Mount Blanco Mine
Mineral: Meyerhofferite
Image: 1166000585
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Meyerhofferit

Bildbreite: 4 mm; Fundort Mount Blanco mine, Black Mts, Furnace Creek, Death Valley, Inyo Co., California, USA
Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-13
Locality: Mount Blanco Mine / Black Mts / Furnace Creek District / Death Valley National Park / Inyo County / Kalifornien (California) / USA
Inyoit mit Meyerhofferit
Views (File:
1248877870
): 1769
Inyoit mit Meyerhofferit
Größe: 95x77x45 mm; Fundort: Monte Azul Lagerstätte, Sijes, Salta, Argentinien
Copyright: Rob Lavinsky; Contribution: Philip Blümner
Location: Argentinien/Salta, Provinz/Sijes/Monte Azul
Mineral: Inyoite, Meyerhofferite
Image: 1248877870
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Inyoit mit Meyerhofferit

Größe: 95x77x45 mm; Fundort: Monte Azul Lagerstätte, Sijes, Salta, Argentinien
Copyright: Rob Lavinsky
Contribution: Philip Blümner 2009-07-29
Locality: Monte Azul / Sijes / Salta, Provinz / Argentinien
MEYERHOFFERIT in Inyoit
Views (File:
1349732308
): 467
MEYERHOFFERIT in Inyoit
Mount Blanco Mine im Death Vally National Park, Kalifornien, USA BB.: ca. 3mm
Copyright: Daniel Neumann 77; Contribution: Daniel Neumann 77
Collection: Daniel Neumann 77, Collection number: 00702.a
Location: USA/Kalifornien (California)/Inyo County/Death Valley National Park/Furnace Creek District/Black Mts/Mount Blanco Mine
Mineral: Meyerhofferite
Image: 1349732308
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
MEYERHOFFERIT in Inyoit (SNr: 00702.a)

Mount Blanco Mine im Death Vally National Park, Kalifornien, USA BB.: ca. 3mm
Collection: Daniel Neumann 77
Copyright: Daniel Neumann 77
Contribution: Daniel Neumann 77 2012-10-08
Locality: Mount Blanco Mine / Black Mts / Furnace Creek District / Death Valley National Park / Inyo County / Kalifornien (California) / USA
Meyerhofferit
Views (File:
1515358653
): 401
Meyerhofferit
Meyerhofferit, Günevi Mine, Bigadiç, Balikesir Prov., Marmara Region, Türkei, 60 x 45 x x20 mm
Copyright: Embarak; Contribution: Embarak
Collection: Embarak
Location: Türkei/Marmararegion/Balikesir, Provinz/Bigadiç, Landkreis/Bigadiç/Günevi Mine
Mineral: Meyerhofferite
Image: 1515358653
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Meyerhofferit

Meyerhofferit, Günevi Mine, Bigadiç, Balikesir Prov., Marmara Region, Türkei, 60 x 45 x x20 mm
Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2018-01-07
Locality: Günevi Mine / Bigadiç / Bigadiç, Landkreis / Balikesir, Provinz / Marmararegion / Türkei

Collectors Summary

Color farblos, weiß
Streak color weiß
Lustre Glasglanz, Seidenglanz
Hardness (Mohs) 2
Cleavages volkommen {010}, in Spuren {100}, {110}
Solubility +++ Säuren, + H2O
Crystal System triklin, P1

Chemism

Chemical formula

CaB3O3(OH)5·H2O

Chemical composition

Calcium, Bor, Sauerstoff, Wasserstoff

Unit weight: 223.563999 u; Number of atoms in the formula: 20

Info

Empirical formula:

CaB3O3(OH)5·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.16

7

35.00

1.0079470

7.0556290
Boron

B

14.51

3

15.00

10.8117000

32.4351000
Oxygen

O

64.41

9

45.00

15.9994300

143.9948700
Calcium

Ca

17.93

1

5.00

40.0784000

40.0784000

Analysis wt%

CaO : 26.06, B2O3 : 44.39, H2O : 27.98 (Ref: Att.Tosc.Pisa,58)

Strunz 9th edition incl. updates

6.CA.30

6: Borate
C: Triborate
A: Insel (Neso)-Triborate
30:Meyerhofferit-Gruppe

Lapis Classification

V/H.06-040

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

Classification by Hölzel

6.CA.250

6: Borates
C: Triborates
A: Nesotriborates
2: Inderite-Group - 3(P+2T)

Dana 8th edition

26.03.02.01

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

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

Lustre

Glasglanz, Seidenglanz

max. Birefringence

0.060
Birefringence chart\! Meyerhofferite title=Birefringence chart Meyerhofferite

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

1.500

RI value β

1.535

RI value γ / ε

1.560

Ri mean

1.532

2V angle

Biaxial (-) 78°

Dispersion

r > v

Optical Data Luminescence

Color LW-UV (365nm)

  

gelblich weiß

Color SW-UV (254nm)

  

gelblich weiß

LW-UV Other Colors

  

bläulich weiß

SW-UV Other Colors

  

bläulich weiß

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

6.617

Cell parameters b (Å)

8.323

Cell parameters c (Å)

6.494

Cell parameters a/b or c/a

0.795

Cell parameters c/b

0.780

Cell parameters α

90.55

Cell parameters β

101.88

Cell parameters γ

86.62

Z

2

Volume (ų)

349.376

X-Ray Powder Diffraction

8.39(100),
6.51(100),
5.03(50),
3.30(30),
3.17(100),
2.540(50),
2.520(50),
2.149(20)
XRD chart Meyerhofferite

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

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.12 (gemessen) 2.125 (berechnet)

2.125 ( ρ calc. Mineralienatlas )

Cleavages

volkommen {010}, in Spuren {100}, {110}

Radioactivity

keine

Instability

+++ Säuren, + H2O

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Inyo County/Death Valley National Park/Furnace Creek District/Black Mts/Mount Blanco Mine

Type material

Harvard University, Cambridge, Massachusetts, USA

National Museum of Natural History, Washington, USA

Collection number of type material

134572 (Harvard), 134572 (Washington)

Preface

Occurrences

Typischerweise eine kleinere Komponente von sedimentären oder Seeboden Boratlagerstetten.

Associations

Inyoit, Colemanit, Hydroboracit, Ulexit

Name from

Wilhelm Meyerhoffer (1864–1906), einem deutschen Chemiker der zuerst das Mineral synthetisierte

Author (Name, Year)

Schaller, 1914

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 451

Burns, P.C. and F.C. Hawthorne - Hydrogen bonding in meyerhofferite: an X-ray and structure energy study. Can. Mineral., 31 (1993), 305–312.

G. Diego Gatta, Giorgio Guastella, Silvia C. Capelli, Davide Comboni, Alessandro Guastoni: On the crystal-chemistry of meyerhofferite, CaB3O3(OH)5·H2O. Physics and Chemistry of Minerals Volume 49 (2022) Article number: 22. Open Access https://link.springer.com/article/10.1007/s00269-022-01199-1

Other languages

German

Meyerhofferit

Spanish

Meyerhofferita

French

Meyerhofferite

English

Meyerhofferite

Russian

Мейергофферит

CNMNC symbol

Symbol

Mhf

Locations with GPS information

IDs

GUSID (Global unique identifier short form) V_Hv3OqQWkG5J-XZ4KRlmQ
GUID (Global unique identifier) DCEFF157-90EA-415A-B927-E5D9E0A46599
Database ID 2523