Hostname: page-component-77c89778f8-m8s7h Total loading time: 0 Render date: 2024-07-23T03:53:43.236Z Has data issue: false hasContentIssue false
  • English
  • Français

Wupatkiite from the Cameron Uranium District, Arizona, a new member of the halotrichite group

Published online by Cambridge University Press:  05 July 2018

Sidney A. Williams  and
Fabien P. Cesbron
Sidney A. Williams
Affiliation:
Globo de Plomo, Box 872, Douglas AZ 85608, USA
Fabien P. Cesbron
Affiliation:
LEMI-ESEM, Rue Leonardo de Vinci, 45072 Orleans Cedex 2, France
Get access Rights & Permissions [Opens in a new window]

Abstract

Wupatkiite (Co,Mg,Ni)Al2(SO4)4.22H2O is a new member of the halotrichite group. It occurs 8 miles ESE of Gray Mountain, Arizona, near the prehistoric pueblo dwelling Wupatki. It occurs as cross-fibre veinlets with fibres up to 8mm long. Colour: empire rose (RHS48C), streak white, H. = 1 ½. G = 1.92, D(calc) = 1.87g/cm3. Nonpleochroic with α = 1.477, γ = 1.484, Z^fibre axis = 12°. Wet chemistry gave MgO 1.63, CaO 0.10, MnO 0.17, FeO 0.15, NiO 0.52, CuO 0.12, CoO 3.41, Al2O3 11.30, SO3 35.97, H2O 42.26 (total 95.63%); rem. = montmorillonite and quartz. Parameters refinedo from the powder pattern are close to those of halotrichite. Wupatkiite is monoclinic P21/c with a = 6.189 Å, b = 24.23 Å, c = 21.20 Å, β = 100.33°. Strongest lines are 4.790, 100 (024); 4.295, 27 (140); 3.945, 26 (025); 3.768, 33 (062); 3.494, 92 (124, 063).

Keywords

wupatkiitehalotrichitenew mineralGray MountainArizona
Type
Mineralogy
Information
Mineralogical Magazine , Volume 59 , Issue 396 , September 1995 , pp. 553 - 556
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Austin, S.R. (1964) Mineralogy of the Cameron Area, Coconino County, Arizona. U.S. Atomic Energy Comm. RME-99, Tech. Inf. Serv., Oak Ridge, 99.Google Scholar
Dubanskỳ, A. (1956) PZispevky K Poznani geochemie sekundarnich sulfatu III, Sulfaty z Dubniku u PreSova. Chem. hasty Praha, 50, 1347–61.Google Scholar