Calderonite Mineral Data

Calderonite Mineral Data

General Calderonite Information

Chemical Formula:

Pb2Fe+++(VO4)2(OH)

Composition:

Molecular Weight = 711.73 gm

Vanadium 13.60 % V 24.28 % V₂O₅

Iron 7.06 % Fe 10.10 % Fe₂O₃

Copper 0.45 % Cu 0.56 % CuO

Hydrogen 0.21 % H 1.90 % H₂O

Lead 58.22 % Pb 62.72 % PbO

Oxygen 20.46 % O

______ ______

100.00 % 99.55 % = TOTAL OXIDE

Empirical Formula:

Pb₂Fe³⁺_0.9Cu_0.05(VO₄)_1.9(OH)_1.5

Environment:

Upper oxidation zone of a Pb-An hydrothermal deposit. (Mn-free brackebuschite)

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Santa Marta and Azuaga, Badajoz province, Spain Link to MinDat.org Location Data.

Name Origin:

Named for Salvador Caleron (1852-1911) in recognition of his important contribution to the mineralogy of Spain.

Synonym:

Ferribrackebushite

IMA2001-022

Calderonite Image

Images:

Calderonite

Comments: Secondary electron image showing a cluster of prismatic calderonite crystals. (AmMin, 88:1704).
Location: Santa Marta, Badajoz province, Spain. Scale: See Image.
© American Mineralogist

Calderonite Crystallography

Axial Ratios:

a:b:c =1.2516:1:1.4591

Cell Dimensions:

a = 7.66, b = 6.12, c = 8.93, Z = 2; beta = 112° V = 388.15 Den(Calc)= 6.09

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.242(1)(211), 2.746(0.48)(003), 2.98(0.48)(103),4.893(0.43)(011), 4.166(0.34)(002), 3.058(0.25)(020), 2.449(0.2)(022),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Gonzalez del Tanago J , La Iglesia A , Rius J , Santin S F , American Mineralogist , 88 (2003) p.1703-1708, Calderonite, a new lead-iron-vanadate of the brackebuschite group

Physical Properties of Calderonite

Color:

Reddish orange, Reddish brown.

Diaphaniety:

Semitransparent-translucent

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous - Adamantine

Streak:

red orange

Optical Properties of Calderonite

Gladstone-Dale:

CI calc= 0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1806,KC= 0.2052

Optical Data:

Biaxial (+), b=2.1

Calculated Properties of Calderonite

Electron Density:

r_electron=5.25 gm/cc
note: r_Calderonite=6.09 gm/cc.

Fermion Index

Fermion Index = 0.13061
Boson Index = 0.86939

Photoelectric:

PE_Calderonite=1,042.08 barns/electron
U=PE_Calderonite x r_electron=5,472.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Calderonite is Not Radioactive

Calderonite Classification

Dana Class:

40.2.8.4 (40)Hydrated Phosphates, etc

(40.2)where A++ (B++)2 (XO4) · x(H2O)

(40.2.8)Brackebushite Group

40.2.8.1 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 2₁/m 2/m

40.2.8.2 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2·(H2O) P 2₁/m 2/m

40.2.8.3 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2·(H2O) P 2₁,P 2₁/m Mono

40.2.8.4 Calderonite ! Pb2Fe(VO4)2(OH) P 2₁/m 2/m

40.2.8.5 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 2₁/m 2/m

Strunz Class:

VII/B.24-28 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.24 - Brackebuschite - Tsumebite group, Bearthite - Jamesite series

VII/B.24-05 Bearthite Ca2Al(PO4)2(OH) P 2₁/m 2/m

VII/B.24-10 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 2₁/m 2/m

VII/B.24-20 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 2₁/m 2/m

VII/B.24-22 Tokyoite! Ba2Mn(VO4)2(OH) P 2₁/m 2/m

VII/B.24-25 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 2₁/m 2/m

VII/B.24-28 Calderonite Pb2Fe(VO4)2(OH) P 2₁/m 2/m

VII/B.24-30 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 2₁/m 2/m

VII/B.24-40 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2·(H2O) P 2₁/m 2/m

VII/B.24-45 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2·(H2O) P 2₁,P 2₁/m Mono

VII/B.24-50 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 2₁/m 2/m

VII/B.24-60 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 2₁/m 2/m

VII/B.24-65 Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1

VII/B.24-70 Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1

Other Calderonite Information

References:

NAME( AmMin, v 88, p 1703) PHYS. PROP.(AmMin, v 88, p 1703) OPTIC PROP.(AmMin, v 88, p 1703)

See Also:

Links to other databases for Calderonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Calderonite

Pb2Fe+++(VO4)2(OH)
Dana No: 40.2.8.4 Strunz No: VII/B.24-28
Locality:

Notes: