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Meyerhofferite

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Formula:
Ca2(H3B3O7)2 · 4H2O
Colour:
Colourless, white
Lustre:
Vitreous, Silky
Hardness:
2
Specific Gravity:
2.12
Crystal System:
Triclinic
Member of:
Name:
For German chemist, Wilhelm Meyerhoffer (1864-1906), collaborator with J.H. van't Hoff on the composition and origin of saline minerals, and who synthesized the compound.
Inderite Group.
Occurs principally as an alteration product of Inyoite.


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Classification of MeyerhofferiteHide

Approved, 'Grandfathered' (first described prior to 1959)
6.CA.30

6 : BORATES
C : Triborates
A : Neso-triborates
26.3.2.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
9.3.17

9 : Borates
3 : Borates of Ca and Sr

Physical Properties of MeyerhofferiteHide

Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Colourless, white
Hardness:
Cleavage:
Perfect
On {010} perfect; {100} and {110} in traces.
Density:
2.12 g/cm3 (Measured)    2.116 g/cm3 (Calculated)

Optical Data of MeyerhofferiteHide

Type:
Biaxial (-)
RI values:
nα = 1.500 nβ = 1.535 nγ = 1.560
2V:
Measured: 78° , Calculated: 78°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak

Chemical Properties of MeyerhofferiteHide

Formula:
Ca2(H3B3O7)2 · 4H2O
IMA Formula:
CaB3O3(OH)5 · H2O

Crystallography of MeyerhofferiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.6 Å, b = 8.33 Å, c = 6.48 Å
α = 91°, β = 101.31°, γ = 86.55°
Ratio:
a:b:c = 0.792 : 1 : 0.778
Unit Cell V:
348.70 ų (Calculated from Unit Cell)
Morphology:
Crystals elongated [001] and usually flattened (100). Fibrous. As pseudomorphs after Inyoite.

Crystallographic forms of MeyerhofferiteHide

Crystal Atlas:
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Meyerhofferite no.1 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Type Occurrence of MeyerhofferiteHide

Other Language Names for MeyerhofferiteHide

Relationship of Meyerhofferite to other SpeciesHide

Member of:
Other Members of this group:
InderboriteCaMg(H3B3O7)2 · 8H2OMon. 2/m
InderiteMgB3O3(OH)5 · 5H2OMon. 2/m : P21/b
InyoiteCa(H4B3O7)(OH) · 4H2OMon. 2/m
KurnakoviteMgB3O3(OH)5 · 5H2OTric. 1 : P1
SolongoiteCa2(H3B3O7)(OH)ClMon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Inyoite62 photos of Meyerhofferite associated with Inyoite on mindat.org.
Colemanite7 photos of Meyerhofferite associated with Colemanite on mindat.org.
Todorokite2 photos of Meyerhofferite associated with Todorokite on mindat.org.
Nobleite1 photo of Meyerhofferite associated with Nobleite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.CA.10AmeghiniteNa(H4B3O7)Mon.
6.CA.15InderiteMgB3O3(OH)5 · 5H2OMon. 2/m : P21/b
6.CA.20KurnakoviteMgB3O3(OH)5 · 5H2OTric. 1 : P1
6.CA.25InderboriteCaMg(H3B3O7)2 · 8H2OMon. 2/m
6.CA.35InyoiteCa(H4B3O7)(OH) · 4H2OMon. 2/m
6.CA.40SolongoiteCa2(H3B3O7)(OH)ClMon.
6.CA.45Peprossiite-(Ce)(Ce,La)(Al3O)2/3B4O10Hex. 6 m2 : P62m
6.CA.50NifontoviteCa3B6O6(OH)12(H2O)2Mon.
6.CA.55OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.3.1CalciboriteCa(B2O4)Orth.
9.3.2SibirskiteCa2(HB2O5)(OH)Mon.
9.3.3FabianiteCaB3O5OHMon. 2/m : P21/b
9.3.4UralboriteCa2[B3O3(OH)5 · OB(OH)3]Mon.
9.3.5VimsiteCaB2O2(OH)4Mon.
9.3.6OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O
9.3.7FroloviteCa[B(OH)4]2Tric.
9.3.8KorzhinskiteCa(B2O4) · H2O
9.3.9TyretskiteCa2B5O9OH · H2OTric.
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2Mon.
9.3.12InyoiteCa(H4B3O7)(OH) · 4H2OMon. 2/m
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2OMon.
9.3.14ColemaniteCa[B3O4(OH)3] · H2OMon. 2/m : P21/b
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2OTric.
9.3.16HexahydroboriteCa[B(OH)4]2 · 2H2O or CaB2O4 · 6H2OMon. 2/m : B2/b
9.3.18PriceiteCa2B5O7(OH)5 · H2OMon. 2/m : P21/b
9.3.19GinoriteCa2B14O20(OH)6 · 5H2OMon.
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2OMon. 2/m
9.3.21UlexiteNaCa[B5O6(OH)6] · 5H2OTric. 1 : P1
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2OMon.
9.3.23InderboriteCaMg(H3B3O7)2 · 8H2OMon. 2/m
9.3.24WardsmithiteCa5Mg[B4O7]6 · 30H2OHex.
9.3.25HenmiliteCa2Cu[B(OH)4]2(OH)4Tric.
9.3.26StrontioboriteSrB8O11(OH)4Mon.
9.3.27VeatchiteSr2B11O16(OH)5 · H2OMon. m : Bb
9.3.28Veatchite-ASr2B11O16(OH)5 · H2OTric.
9.3.29 P-VeatchiteSr2B11O16(OH)5 · H2O
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2OMon. 2/m : P21/b
9.3.32StrontioginoriteCaSrB14O20(OH)6 · 5H2OMon. 2/m : P21/b

Other InformationHide

Notes:
Readily soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MeyerhofferiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller, W.T. (1914) Journal of the Washington Academy of Science: 4: 355.
Schaller, W.T. (1916), Inyoite and meyerhofferite, two new calcium borates, USGS Bull. 610: 35-55.
Palache, Charles (1938), Crystallography of meyerhofferite: American Mineralogist: 23: 644-648.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 356-358.
Christ, C.L. & J.R. Clark (1956), The structure of meyerhofferite 2CaO • 3B2O•7H2O, aP1 crystal, determined by the direct method of Hauptman and Karle: Acta Crystallographica: 9: 830.
Zeitschrift für Kristallographie (1960): 114: 321, 343-354.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for MeyerhofferiteHide

Localities for MeyerhofferiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Salta
    • Los Andes department
      • Sijes
Jewel Tunnel Import specimens.
Colorado School of Mines Geology Museum specimen
Galliski, M.A., Cooper, M.A., Márquez-Zavalía, M.F., and Hawthorne, F.C. (2010) Alfredstelznerite: a new calcium borate hydrate from Santa Rosa mine, Salta, northwestern Argentina. Canadian Mineralogist, 48, 123-128; CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, 9:1-27.
Mexico
 
  • Sonora
    • Mun. de Magdalena
      • Aguja
Garrett, D.E. (1998): Borates - Handbook of Deposits, Processing, Properties and Use. Academic Press (San Diego, London), 475 pp.; Miranda-Gasca, M. A., Gomez-Caballero, J. A., & Eastoe, C. J. (1998). Borate deposits of northern Sonora, Mexico; stratigraphy, tectonics, stable isotopes, and fluid inclusions. Economic Geology, 93(4), 510-523.
Turkey
 
  • Aegean Region
    • Aydin Province
    • Kütahya Province
      • Emet
        • Emet Borate deposit
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27; American Mineralogist; April 1979; v. 64; no. 3-4; p. 362-366
J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. V (2003)
  • Central Anatolia Region
    • Eskişehir Province
      • Kirka
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27; http://www.mineralienatlas.de/lexikon/index.php/T%FCrkei/Eskisehir/Kirka/Sarikaya; Baysal, O. (1972) : A mineralogical study and genesis of Sarıkaya (Kırka) borate deposits. Hacettepe University, Ankara.
  • Marmara Region
    • Balikesir Province
      • Bigadiç
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
        • Çamköy
Meixner, H. (1953): Contributions to Mineralogy and Petrology 3(6), 445-455.
        • Faraşköy (Faraş)
Erik Vercammen collection
        • Iskeleköy (Iskele)
Meixner, H. (1953): Contributions to Mineralogy and Petrology 3(6), 445-455.
USA (TL)
 
  • California
    • Inyo Co.
      • Amargosa Range
        • Black Mts
          • Monte Blanco
Journal of the Washington Academy of Science (1914): 4: 354-356; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th. ed., Volume II: 357, 359; Schaller, Waldemar Theodore (1916b), Inyoite and meyerhofferite, two new calcium borates: USGS Bulletin 610: 35; Foshag, William Frederick (1921), The origin of the colemanite deposits of California: Economic Geology: 16: 200; Foshag, William Frederick (1924a), Famous mineral localities: Furnace Creek, Death Valley, California: American Mineralogist: 9: 10; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 264.
          • Zabriskie Point
www.mineralsocal.org
      • Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area)
        • Ryan
Schaller, Waldemar Theodore (1916b), Inyoite and meyerhofferite, two new calcium borates: USGS Bulletin 610: 35; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 228.
Am Min (1959) 44:911-919
Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 349-357.
        • Twenty Mule Team Canyon
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 911-919.
    • Kern Co.
      • Kramer District (Kramer Borate District)
www.mineralsocal.org
Cal Div of Mines & Geology "Mineral Information Service" V. 22 N. 10 Oct 1969
            • U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine)
Pemberton, H. Earl, Wm. Moller, Jack Schwartz & George Masimer (1960), The minerals of Boron, California, 40 pp. (Published by the Mineral Research Soc. of California, Montebello, CA): 27; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 265; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 246.
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