Teruggite Mineral Data

Teruggite Mineral Data +

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General Teruggite Information

Chemical Formula:

Ca4MgAs2B12O22(OH)12·12(H2O)

Composition:

Molecular Weight = 1,236.44 gm

Calcium 12.97 % Ca 18.14 % CaO

Magnesium 1.97 % Mg 3.26 % MgO

Boron 10.49 % B 33.78 % B₂O₃

Arsenic 12.12 % As 16.00 % As₂O₃

Hydrogen 2.93 % H 26.23 % H₂O

Oxygen 59.52 % O

______ ______

100.00 % 97.41 % = TOTAL OXIDE

Empirical Formula:

Ca₄MgAs₂B₁₂O₂₂(OH)₁₂·12(H₂O)

IMA Status:

Approved IMA 1968

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 10265

PDF 21-150

Teruggite Image

Images:

Teruggite

Comments: Opaque rounded teruggite aggregate.
Location: Loma Blanca, Jujuy, Argentina. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Teruggite Crystallography

Axial Ratios:

a:b:c =0.7879:1:0.314

Cell Dimensions:

a = 15.68, b = 19.9, c = 6.25, Z = 2; beta = 100.083° V = 1,920.08 Den(Calc)= 2.14

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): 12.13(1), 2.785(0.3), 9.98(0.22),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Dal Negro A , Kumbasar I , Ungaretti L , American Mineralogist , 58 (1973) p.1034-1043, The crystal structure of teruggite

Physical Properties of Teruggite

Color:

Colorless.

Density:

2.149

Diaphaniety:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Teruggite

Gladstone-Dale:

CI meas= -0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.25,KPDmeas= 0.249,KC= 0.244

Optical Data:

Biaxial (+), a=1.526, b=1.528, g=1.551, bire=0.0250, 2V(Calc)=34, 2V(Meas)=33.

Calculated Properties of Teruggite

Electron Density:

r_electron=2.16 gm/cc
note: r_Teruggite=2.15 gm/cc.

Fermion Index

Fermion Index = 0.0233
Boson Index = 0.9767

Photoelectric:

PE_Teruggite= 9.63 barns/electron
U=PE_Teruggite x r_electron= 20.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Teruggite is Not Radioactive

Teruggite Classification

Dana Class:

27.1.6.1 (27)Compound Borates

(27.1)Dana Type

(27.1.6)Dana Group

27.1.6.1 Teruggite Ca4MgAs2B12O22(OH)12·12(H2O) P 2₁/a 2/m

Strunz Class:

V/H.18-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.18 - Teruggite series

V/H.18-10 Teruggite Ca4MgAs2B12O22(OH)12·12(H2O) P 2₁/a 2/m

Other Teruggite 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 Teruggite :
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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Print or Cut-and-Paste your Teruggite Specimen Label here :

Teruggite

Ca4MgAs2B12O22(OH)12·12(H2O)
Dana No: 27.1.6.1 Strunz No: V/H.18-10
Locality:

Notes: