Strontioginorite Mineral Data

General Strontioginorite Information

Chemical Formula:

(Sr,Ca)2B14O23•8(H2O)

Composition:

Molecular Weight = 814.92 gm

Strontium 16.13 % Sr 19.07 % SrO

Calcium 2.46 % Ca 3.44 % CaO

Boron 18.57 % B 59.80 % B₂O₃

Hydrogen 1.98 % H 17.69 % H₂O

Oxygen 60.86 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Sr_1.5Ca_0.5B₁₄O₂₃•8(H₂O)

Environment:

Sedimentary borate deposits.

IMA Status:

Approved IMA 1959

Locality:

Reyershausen, near Gottingen, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the composition and relationship to ginorite.

Name Pronunciation:

Strontioginorite

Synonym:

ICSD 15183

PDF 13-137

Volkovite

Strontioginorite Image

Images:

Strontioginorite

Comments: Silky white strontioginorite with anhydrite.
Location: Kohnstein Quarry, Harz Mts, Thuringia, Germany. Scale: Sample Size 4 cm.
© Thomas Witzke / Abraxas-Verlag

Strontioginorite Crystallography

Axial Ratios:

a:b:c =0.8865:1:0.8854

Cell Dimensions:

a = 12.817, b = 14.4576, c = 12.8008, Z = 4; beta = 101.327° V = 2,325.83 Den(Calc)= 2.33

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 7.25(1), 2.1(0.8), 5.4(0.6),

Physical Properties of Strontioginorite

Cleavage:

{010} Perfect, {001} Good

Color:

Colorless.

Density:

2.25

Diaphaneity:

Transparent

Hardness:

2-3 - Gypsum-Calcite

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Strontioginorite

Gladstone-Dale:

CI meas= -0.069 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2308,KPDmeas= 0.239,KC= 0.2236
Ncalc = 1.5 - 1.52

Optical Data:

Biaxial (+), a=1.512, b=1.524, g=1.577, bire=0.0650, 2V(Calc)=54, 2V(Meas)=53.

Calculated Properties of Strontioginorite

Electron Density:

Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Strontioginorite =2.33 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Strontioginorite}= 17.88 barns/electron
U=PE_{Strontioginorite} x rElectron Density= 41.01 barns/cc.

Radioactivity:

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

Strontioginorite Classification

Dana Class:

26.06.07.02 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.06)Dana Type

(26.06.07)Dana Group

26.06.07.01 Ginorite Ca2B14O23•8(H2O) P 2₁/c 2/m

26.06.07.02 Strontioginorite (Sr,Ca)2B14O23•8(H2O) P 2₁/a 2/m

Strunz Class:

06.FC.15 06 - BORATES

06.F - Hexaborates

06.FC -Phyllo-hexaborates

06.FC.15 Ginorite Ca2B14O23•8(H2O) P 2₁/c 2/m

06.FC.15 Strontioginorite (Sr,Ca)2B14O23•8(H2O) P 2₁/a 2/m

Other Strontioginorite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Strontioginorite :
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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Strontioginorite

(Sr,Ca)2B14O23•8(H2O)
Dana No: 26.06.07.02 Strunz No: 06.FC.15
Locality:

Notes:

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