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Inyoite

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Formula:
Ca(H4B3O7)(OH) · 4H2O
System:
Monoclinic
Colour:
Colourless, turning ...
Hardness:
2
Member of:
Name:
After the type locality in Inyo County, California, USA

Classification of Inyoite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
6.CA.35

6 : BORATES
C : Triborates
A : Neso-triborates
26.3.1.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
9.3.12

9 : Borates
3 : Borates of Ca and Sr
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http://www.mindat.org/min-2036.html
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Type Occurrence of Inyoite

Year of Discovery:
1914
Associated Minerals at Type Locality:

Physical Properties of Inyoite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, turning white upon partial dehydration; colourless in transmitted light
Hardness (Mohs):
2
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {001} good; on {010} quality unstated.
Fracture:
Irregular/Uneven
Density:
1.875 g/cm3 (Measured)    

Crystallography of Inyoite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.63Å, b = 12.06Å, c = 8.4Å
β = 114.03°
Ratio:
a:b:c = 0.881 : 1 : 0.697
Unit Cell Volume:
V 983.53 ų (Calculated from Unit Cell)
Morphology:
Crystals short prismatic [001] to tabular {001}, with {110} and {001} dominant. Massive granular; coarse spherulitic aggregates.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Inyoite

Type:
Biaxial (-)
RI values:
nα = 1.495 nβ = 1.505 - 1.512 nγ = 1.520
2V:
Measured: 70° to 84°, Calculated: 70° to 80°
Max Birefringence:
δ = 0.025
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 Inyoite

Formula:
Ca(H4B3O7)(OH) · 4H2O
All elements listed in formula:

Relationship of Inyoite to other Species

Member of:
Other Members of Group:
InderboriteCaMg(H3B3O7)2 · 8H2O
InderiteMgB3O3(OH)5 · 5H2O
KurnakoviteMgB3O3(OH)5 · 5H2O
MeyerhofferiteCa2(H3B3O7)2 · 4H2O
SolongoiteCa2(H3B3O7)(OH)Cl
6.CA.10AmeghiniteNa(H4B3O7)
6.CA.15InderiteMgB3O3(OH)5 · 5H2O
6.CA.20KurnakoviteMgB3O3(OH)5 · 5H2O
6.CA.25InderboriteCaMg(H3B3O7)2 · 8H2O
6.CA.30MeyerhofferiteCa2(H3B3O7)2 · 4H2O
6.CA.40SolongoiteCa2(H3B3O7)(OH)Cl
6.CA.45Peprossiite-(Ce)(Ce,La)(Al3O)2/3B4O10
6.CA.50NifontoviteCa3B6O6(OH)12(H2O)2
6.CA.55OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O
9.3.1CalciboriteCa(B2O4)
9.3.2SibirskiteCa2(HB2O5)(OH)
9.3.3FabianiteCaB3O5OH
9.3.4UralboriteCa2[B3O3(OH)5 · OB(OH)3]
9.3.5VimsiteCaB2O2(OH)4
9.3.6OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O
9.3.7FroloviteCa[B(OH)4]2
9.3.8KorzhinskiteCa(B2O4) · H2O
9.3.9TyretskiteCa2B5O9OH · H2O
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2O
9.3.14ColemaniteCa[B3O4(OH)3] · H2O
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2O
9.3.16HexahydroboriteCa[B(OH)4]2 · 6H2O
9.3.17MeyerhofferiteCa2(H3B3O7)2 · 4H2O
9.3.18PriceiteCa2B5O7(OH)5 · H2O
9.3.19GinoriteCa2B14O20(OH)6 · 5H2O
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2O
9.3.21UlexiteNaCa[B5O6(OH)6] · 5H2O
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2O
9.3.23InderboriteCaMg(H3B3O7)2 · 8H2O
9.3.24WardsmithiteCa5Mg[B4O7]6 · 30H2O
9.3.25HenmiliteCa2Cu[B(OH)4]2(OH)4
9.3.26StrontioboriteSrB8O11(OH)4
9.3.27VeatchiteSr2B11O16(OH)5 · H2O
9.3.28Veatchite-ASr2B11O16(OH)5 · H2O
9.3.29 P-Veatchite
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2O
9.3.32StrontioginoriteCaSrB14O20(OH)6 · 5H2O

Other Names for Inyoite

Name in Other Languages:
German:Inyoit
Russian:Иниоит
Simplified Chinese:板硼钙石
板硼石
Spanish:Inyoita
Traditional Chinese:板硼鈣石
板硼石

Other Information

Other Information:
Soluble in hot water and dilute 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 Inyoite

Reference List:
Schaller, W.T. (1916), Inyoite and meyerhofferite, two new calcium borates, USGS Bull. 610: 35-55.

Poitevin and Ellsworth (1921) Geological Survey of Canada Bulletin, 32.

Boldyreva (1936) Mater. Cent. Sc. Geol. Prosp. Inst., no. 1: 62. (Min. Abs. (1936): 6: 336).

Boky (1937) Bulletin de Académy des sciences de l'Union des Républiques Soviétiques Socialistes, Cl. sc. mat. nat., Ser. chim.: 871.

Boldyreva in: Godlevsky (1937) Mineralogicheskoe Obshchestvo, Leningrad, Zapiski: 66: 315.

Nikolaev and Chelishcheva (1938) Comptes rendus de l’académie des sciences de l’U.R.S.S.: 18: 431.

Chelishcheva (1940) Comptes rendus de l’académie des sciences de l’U.R.S.S: 18: 508.

Murdoch and Webb (1940) American Mineralogist: 25: 549.

Acta Crystallographica: 12: 162-170.

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: 358-360.

Canadian Mineralogist (1981): 19: 291.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Inyoite

Specimens:
The following Inyoite specimens are currently listed for sale on minfind.com.

Localities for Inyoite

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.
Mineral and/or Locality  
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