Bushmakinite Mineral Data

Bushmakinite Mineral Data

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General Bushmakinite Information

Chemical Formula:

Pb2Al(PO4)(VO4)(OH)

Composition:

Molecular Weight = 667.89 gm

Aluminum 3.11 % Al 5.88 % Al₂O₃

Vanadium 5.64 % V 10.08 % V₂O₅

Zinc 0.10 % Zn 0.12 % ZnO

Chromium 1.09 % Cr 2.10 % CrO₃

Copper 2.00 % Cu 2.50 % CuO

Phosphorus 4.64 % P 10.63 % P₂O₅

Hydrogen 0.15 % H 1.38 % H₂O

Lead 62.67 % Pb 67.51 % PbO

Sulfur 0.05 % S 0.12 % SO₃

Oxygen 20.55 % O

______ ______

100.00 % 100.30 % = TOTAL OXIDE

Empirical Formula:

Pb_2.02Al_0.77Cu_0.21Zn_0.01(PO₄)(VO₄)_0.74(CrO₄)_0.14SO₄_0.01(OH)_1.02

Environment:

Oxidation of galena and tetrahedrite in a quartz vein. (brackebuschite group; structure)

IMA Status:

Approved IMA 2002, Dana # Added

Locality:

Berezovskoye gold deposit, middle Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Anatolly F. Bushmakin (1947-1999), in recognition of his work on the Berezovskoye deposit.

Synonym:

IMA2001-031

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Bushmakinite Crystallography

Axial Ratios:

a:b:c =1.3302:1:1.4946

Cell Dimensions:

a = 7.734, b = 5.814, c = 8.69, Z = 2; beta = 112.1° V = 362.04 Den(Calc)= 6.13

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): 3.21(1)(211), 4.68(0.8)(011), 2.91(0.7)(212,020,103),2.71(0.7)(021,122), 2.05(0.5)(123,114), 3.57(0.5)(111,200), 2.27(0.4),

Physical Properties of Bushmakinite

Cleavage:

[001] Perfect, [hk0] Distinct, [hk0] Distinct

Color:

Bright yellow.

Diaphaniety:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Lamellar - Thin laminae producing a lamellar structure.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

yellowish

Optical Properties of Bushmakinite

Gladstone-Dale:

CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1675,KC= 0.172

Optical Data:

Biaxial (-), a=1.99, b=2.03, g=2.06, bire=0.0700, 2V(Calc)=80, 2V(Meas)=large. Dispersion appreciable, r < v.

Calculated Properties of Bushmakinite

Electron Density:

r_electron=5.27 gm/cc
note: r_Bushmakinite=6.13 gm/cc.

Fermion Index

Fermion Index = 0.13981
Boson Index = 0.86019

Photoelectric:

PE_Bushmakinite=1,121.29 barns/electron
U=PE_Bushmakinite x r_electron=5,912.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bushmakinite is Not Radioactive

Bushmakinite Classification

Dana Class:

40.2.8.5 (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.24-25 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 Bushmakinite Information

References:

NAME( AmMin, Vol 88, p 475) PHYS. PROP.(AmMin, Vol 88, p 475) OPTIC PROP.(AmMin, Vol 88, p 475)

See Also:

Links to other databases for Bushmakinite :
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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Bushmakinite

Pb2Al(PO4)(VO4)(OH)
Dana No: 40.2.8.5 Strunz No: VII/B.24-25
Locality:

Notes: