Cervantite Mineral Data

General Cervantite Information

Chemical Formula:

Sb+++Sb+++++O4

Composition:

Molecular Weight = 307.50 gm

Antimony 79.19 % Sb 47.40 % Sb₂O₃ / 52.60 % Sb₂O₅

Oxygen 20.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

SbSbO₄

Environment:

Alteration product of stibnite.

IMA Status:

Valid Species (Pre-IMA) 1850

Locality:

Cervantes, Spain. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Synonym:

ICSD 63271

PDF Nov-45

Cervantite Image

Images:

Cervantite

Comments: Brownish-yellow, rounded crystalline aggregate of cervantite on quartz.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-WÃ¼rttemberg, Germany. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Cervantite Crystallography

Axial Ratios:

a:b:c =1.1301:1:2.4449

Cell Dimensions:

a = 5.436, b = 4.81, c = 11.76, Z = 4; V = 307.49 Den(Calc)= 6.64

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pbn21

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

By Intensity(I/I_o): 3.06(1), 1.854(0.7), 2.91(0.7),

Crystal Structure:

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Thornton G , Acta Crystallographica, Section B , 33 (1977) p.1271-1273, A neutron diffraction study of a-Sb2O4, Locality: synthetic

Physical Properties of Cervantite

Cleavage:

{001} Perfect

Color:

Yellow, Yellowish orange, White, Cream.

Density:

6.4 - 6.6, Average = 6.5

Diaphaneity:

Transparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous - Pearly

Streak:

light yellow

Optical Properties of Cervantite

Gladstone-Dale:

CI meas= 0.086 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.105 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1581,KPDmeas= 0.1615,KC= 0.1767
Ncalc = 2.13 - 2.17

Optical Data:

Biaxial (?), a=2, g=2.1, bire=0.1000

Calculated Properties of Cervantite

Electron Density:

Bulk Density (Electron Density)=5.67 gm/cc
note: Specific Gravity of Cervantite =6.50 gm/cc.

Fermion Index:

Fermion Index = 0.0000998995
Boson Index = 0.9999001005

Photoelectric:

PE_Cervantite= 267.22 barns/electron
U=PE_Cervantite x rElectron Density=1,513.80 barns/cc.

Radioactivity:

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

Cervantite Classification

Dana Class:

04.04.16.01 (04)Simple Oxides

(04.04)with a cation charge of 4+ (A++++ O2)

(04.04.16)Dana Group

04.04.16.01 Cervantite SbSbO4 Pbn21 mm2

04.04.16.02 Clinocervantite! SbSbO4 C 2/c 2/m

Strunz Class:

04.DE.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DE -With medium-sized cations; with various polyhedra

04.DE.30 Cervantite SbSbO4 Pbn21 mm2

04.DE.30 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m

04.DE.30 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m

04.DE.30 Clinocervantite! SbSbO4 C 2/c 2/m

04.DE.30 Stibiocolumbite SbNbO4 Pc21n mm2

04.DE.30 Stibiotantalite SbTaO4 Pc21n mm2

Other Cervantite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Cervantite :
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 Cervantite Specimen Label here :

Cervantite

Sb+++Sb+++++O4
Dana No: 04.04.16.01 Strunz No: 04.DE.30
Locality:

Notes: