Inyoite Mineral Data

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General Inyoite Information

Chemical Formula:

Ca2B6O6(OH)10•8(H2O)

Composition:

Molecular Weight = 277.60 gm

Calcium 14.44 % Ca 20.20 % CaO

Boron 11.68 % B 37.62 % B₂O₃

Hydrogen 4.72 % H 42.18 % H₂O

Oxygen 69.16 % O

______ ______

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.

Name Pronunciation:

Inyoite

Synonym:

ICSD 22196

PDF 37-1459

Inyoite Image

Images:

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

Inyoite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.03(1), 7.59(0.7), 2.286(0.25),

Forms:

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Forms: ( 2 0 1) ( 1 1 1) ( 1 2 0) ( 0 1 0) ( 1 0 1) ( 0 1 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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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

Physical Properties of Inyoite

Cleavage:

{001} Good

Color:

White, Pinkish white.

Density:

1.87

Diaphaneity:

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:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Inyoite

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
Ncalc = 1.5

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.

Calculated Properties of Inyoite

Electron Density:

Bulk Density (Electron Density)=1.94 gm/cc
note: Specific Gravity of Inyoite =1.87 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Inyoite= 1.98 barns/electron
U=PE_Inyoite x rElectron Density= 3.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Inyoite is Not Radioactive

Inyoite Classification

Dana Class:

26.03.01.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.03)Dana Type

(26.03.01)Inyoite Group

26.03.01.01 Inyoite Ca2B6O6(OH)10•8(H2O) P 2₁/a 2/m

26.03.01.02 Inderborite CaMg[B3O3(OH)5]2•6(H2O) A2/a 2/m

26.03.01.03 Inderite MgB3O3(OH)5•5(H2O) P 2₁/a 2/m

Strunz Class:

06.CA.35 06 - BORATES

06.C - Triborates

06.CA -Neso-triborates

06.CA.35 Inyoite Ca2B6O6(OH)10•8(H2O) P 2₁/a 2/m

Other Inyoite Information

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Inyoite

Ca2B6O6(OH)10•8(H2O)
Dana No: 26.03.01.01 Strunz No: 06.CA.35
Locality:

Notes: