Strontioginorite Mineral Data

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)

IMA Status:

Approved IMA 1959

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 15183

PDF 13-137

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Strontioginorite Crystallography

Axial Ratios:

a:b:c =0.8874:1:0.887

Cell Dimensions:

a = 12.85, b = 14.48, c = 12.845, Z = 4; beta = 101.6° V = 2,341.23 Den(Calc)= 2.31

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): 7.25(1), 2.1(0.8), 5.4(0.6),

Crystal Structure:

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Konnert J A , Clark J R , Christ C L , American Mineralogist , 55 (1970) p.1911-1931, Crystal structure of strontioginorite, (Sr,Ca)2B14O20(OH)6.5H2O

View Additional jPOWD Structure files for Strontioginorite
[1]

Physical Properties of Strontioginorite

Cleavage:

[010] Perfect, [001] Good

Color:

Colorless.

Density:

2.25

Diaphaniety:

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= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2328,KPDmeas= 0.239,KC= 0.2236

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:

r_electron=2.27 gm/cc
note: r_{Strontioginorite}=2.31 gm/cc.

Fermion Index

Fermion Index = 0.04857
Boson Index = 0.95143

Photoelectric:

PE_{Strontioginorite}= 17.88 barns/electron
U=PE_{Strontioginorite} x r_electron= 40.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Strontioginorite is Not Radioactive

Strontioginorite Classification

Dana Class:

26.6.7.2 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.6)Dana Type

(26.6.7)Dana Group

26.6.7.1 Ginorite Ca2B14O23·8(H2O) P 2₁/c 2/m

26.6.7.2 Strontioginorite (Sr,Ca)2B14O23·8(H2O) P 2₁/a 2/m

Strunz Class:

V/K.07-20 V - Nitrates, Carbonates and Borates

V/K - Layered borates with complex groups [Bx(O,OH)y]

V/K.07 - Ginorite - Strontioborite series

V/K.07-10 Ginorite Ca2B14O23·8(H2O) P 2₁/c 2/m

V/K.07-20 Strontioginorite (Sr,Ca)2B14O23·8(H2O) P 2₁/a 2/m

V/K.07-30 Strontioborite SrB8O11(OH)4 P 2₁ 2

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 -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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Strontioginorite

(Sr,Ca)2B14O23·8(H2O)
Dana No: 26.6.7.2 Strunz No: V/K.07-20
Locality:

Notes: