General Inyoite Information
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Chemical Formula: |
Ca2B6O6(OH)10·8(H2O) |
Composition: |
Molecular Weight = 277.60 gm |
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Calcium 14.44 % Ca 20.20 % CaO |
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Boron 11.68 % B 37.62 % B2O3 |
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Hydrogen 4.72 % H 42.18 % H2O |
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Oxygen 69.16 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
CaB3O3(OH)5·4(H2O) |
IMA Status: |
Valid Species (Pre-IMA) 1916 |
Locality: |
Mount Blanco mine, Mount Blanco, Black Mountains, Death Valley, Inyo County, California. Link to MinDat.org Location Data. |
Name Origin: |
Named after it's locality. |
Synonym: |
ICSD 22196 |
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PDF 37-1459 |
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Inyoite Image |
Images:
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Inyoite
Comments: Glassy gray translucent crystals of inyoite 1.5 cm.+, with minor alteration to white meyerhofferite.
Location: Loma Blanca Mine, Jujuy Province, Argentina.
Scale: 5.2x4.1x3.1 cm.
© Richard Dale / Dale Minerals |
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Inyoite Crystallography
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Axial Ratios: |
a:b:c =0.8814:1:0.6969 |
Cell Dimensions: |
a = 10.63, b = 12.06, c = 8.405, Z = 4; beta = 114° V = 984.35 Den(Calc)= 1.87 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a |
X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 7.59(0.7), 2.286(0.25), |
Forms:
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Forms:
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Crystal Structure:
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Clark J R , Acta Crystallographica , 12 (1959) p.162-170, Studies of borate minerals IV. The structure of inyoite, CaB3O3(OH)5*4H2O
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Physical Properties of Inyoite
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Cleavage: |
[001] Good |
Color: |
White, Pinkish white. |
Density: |
1.87 |
Diaphaniety: |
Transparent to Translucent |
Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Habit: |
Spherical - Spherical, rounded aggregates. |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
2 - Gypsum |
Luminescence: |
None. |
Luster: |
Vitreous (Glassy) |
Magnetism: |
Nonmagnetic |
Streak: |
white |
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Optical Properties of Inyoite
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Gladstone-Dale: |
CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2715,KPDmeas= 0.2715,KC= 0.2667 |
Optical Data: |
Biaxial (-), a=1.495, b=1.505-1.5115, g=1.52, bire=0.0250, 2V(Calc)=70-80, 2V(Meas)=70-84. Dispersion relatively weak. |
Pleochroism (x): |
none. |
Pleochroism (y): |
none. |
Pleochroism (z): |
none. |
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Calculated Properties of Inyoite
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Electron Density: |
relectron=1.94 gm/cc note: rInyoite =1.87 gm/cc. |
Fermion Index |
Fermion Index = 0.02378 Boson Index = 0.97622 |
Photoelectric: |
PEInyoite = 1.98 barns/electron U=PEInyoite x relectron= 3.84 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Inyoite is Not Radioactive |
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Inyoite Classification
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Dana Class: |
26.3.1.1 (26)Hydrated Borates Containing Hydroxyl or Halogen |
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(26.3)Dana Type |
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(26.3.1)Dana Group |
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26.3.1.1 Inyoite Ca2B6O6(OH)10·8(H2O) P 21/a 2/m |
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26.3.1.2 Inderborite CaMg[B3O3(OH)5]2·6(H2O) A2/a 2/m |
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26.3.1.3 Inderite MgB3O3(OH)5·5(H2O) P 21/a 2/m |
Strunz Class: |
V/H.06-50 V - Nitrates, Carbonates and Borates |
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V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2- |
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V/H.06 - Kurnakovite - Solongoite series |
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V/H.06-10 Kurnakovite MgB3O3(OH)5·5(H2O) P1 1 |
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V/H.06-20 Inderite MgB3O3(OH)5·5(H2O) P 21/a 2/m |
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V/H.06-30 Inderborite CaMg[B3O3(OH)5]2·6(H2O) A2/a 2/m |
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V/H.06-40 Meyerhofferite Ca2B6O6(OH)10·2(H2O) P1 1 |
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V/H.06-50 Inyoite Ca2B6O6(OH)10·8(H2O) P 21/a 2/m |
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V/H.06-60 Solongoite Ca2B3O4(OH)4Cl P 21/c 2/m |
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Other Inyoite Information
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References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) |
See Also: |
Links to other databases for Inyoite :
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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Inyoite
Ca2B6O6(OH)10·8(H2O)
Dana No: 26.3.1.1 Strunz No: V/H.06-50
Locality:
Notes:
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