Meyerhofferite Mineral Data + Say MEYERHOFFERITE

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General Meyerhofferite Information

Help on Chemical  Formula: Chemical Formula: Ca2B6O6(OH)10·2(H2O)
Help on Composition: Composition: Molecular Weight = 447.12 gm
   Calcium   17.93 %  Ca   25.08 % CaO
   Boron     14.51 %  B    46.71 % B2O3
   Hydrogen   3.16 %  H    28.20 % H2O
   Oxygen    64.41 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2B6O6(OH)10·2(H2O)
Help on Environment: Environment: Commonly forms pseudomorphs after inyoite by dehydration.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1914
Help on Locality: Locality: Mount Blanco mine, Mount Blanco, Black Mountains, Death Valley, Inyo Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wilhelm Myerhoffer (1864-1906), German chemist who synthesized the mineral.
Help on Synonym: Synonym: ICSD 75922
  PDF 12-411
 

Meyerhofferite Image

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Meyerhofferite

Comments: Transparent, tabular crystals of meyerhofferite on matrix.
Location: 20-Mule Team Canyon, Death Valley, Inyo County, California, USA. Scale: Crystal size 1.5 cm.
© John Veevaert

Meyerhofferite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.795:1:0.7802
Help on Cell Dimensions: Cell Dimensions: a = 6.617, b = 8.323, c = 6.494, Z = 1; alpha = 90.55°, beta = 102.28°, gamma = 87.2° V = 349.03 Den(Calc)= 2.13
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.47(1), 8.31(1), 4.97(0.25),
Help on Forms: Forms:

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Drag2 - Resize

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Help on Above

Forms: [ 0 1 0] [ 0 1 1] [ 1 0 1] [ 1 1 0] [ 1 0 0] [ 0 0 1]

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Click Here for Large Meyerhofferite Structure Window Crystal Structure:

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Burns P C , Hawthorne F C , The Canadian Mineralogist , 31 (1993) p.305-312, Hydrogen bonding in meyerhofferite: An X-ray and structure energy study, from Mount Blanco, Death Valley, California, Locality: Mount Blanco, Death Valley, California, USA

 

Physical Properties of Meyerhofferite

Help on Cleavage: Cleavage: [010] Perfect, [100] Indistinct, [110] Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.12
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Meyerhofferite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2496,KPDmeas= 0.2508,KC= 0.249
Help on Optical Data: Optical Data: Biaxial (-), a=1.5, b=1.535, g=1.56, bire=0.0600, 2V(Calc)=78, 2V(Meas)=78. Dispersion relatively weak.
 

Calculated Properties of Meyerhofferite

Help on Electron Density: Electron Density:

relectron=2.17 gm/cc
note: rMeyerhofferite =2.13 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02942
Boson Index = 0.97058
Help on Photoelectric: Photoelectric:

PEMeyerhofferite = 2.41 barns/electron
U=PEMeyerhofferite x relectron= 5.23 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Meyerhofferite is Not Radioactive

 

Meyerhofferite Classification

Help on  Dana Class: Dana Class: 26.3.2.1 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.3)Dana Type
  (26.3.2)Dana Group
 
26.3.2.1 Meyerhofferite Ca2B6O6(OH)10·2(H2O) P1 1
Help on  Strunz Class: Strunz Class: V/H.06-40 V - Nitrates, Carbonates and Borates
  V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-
  V/H.06 - Kurnakovite - Solongoite series
 
V/H.06-10 Kurnakovite MgB3O3(OH)5·5(H2O) P1 1
 
V/H.06-20 Inderite MgB3O3(OH)5·5(H2O) P 21/a 2/m
 
V/H.06-30 Inderborite CaMg[B3O3(OH)5]2·6(H2O) A2/a 2/m
 
V/H.06-40 Meyerhofferite Ca2B6O6(OH)10·2(H2O) P1 1
 
V/H.06-50 Inyoite Ca2B6O6(OH)10·8(H2O) P 21/a 2/m
 
V/H.06-60 Solongoite Ca2B3O4(OH)4Cl P 21/c 2/m
 

Other Meyerhofferite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Meyerhofferite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Meyerhofferite Specimen Label here :

Meyerhofferite

Ca2B6O6(OH)10·2(H2O)
Dana No: 26.3.2.1 Strunz No: V/H.06-40
Locality:

 

Notes:

 

 
   
 
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