Asisite R070635

Name: Asisite
RRUFF ID: R070635
Ideal Chemistry: Pb7SiO8Cl2
Locality: Kombat mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
Source: Ausrox/Rob Sielicki [view label]
Owner: RRUFF
Description: Reddish-orange crystals with pronounced cleavage
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Asisite (1) ]
RRUFF ID: R070635.2
Sample Description: Microprobe Fragment
Measured Chemistry: Pb7.00(Si0.55V5+0.26As5+0.100.09)Σ=1O8Cl2.00
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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RRUFF ID: R070635
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R070635.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 3.9498(4)Å    b: 3.9498(4)Å    c: 22.676(5)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 353.8(1)Å3    Crystal System: tetragonal
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Asisite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Rouse R C, Peacor D R, Dunn P J, Criddle A J, Stanley C J, Innes J (1988) Asisite, a silicon-bearing lead oxychloride from the Kombat mine, South West Africa (Namibia), American Mineralogist, 73, 643-650   [view file]

Dunn P J (1991) Rare minerals of the Kombat mine, The Mineralogical Record, 22, 421-425

Welch M D (2004) Pb-Si ordering in sheet-oxychloride minerals: the super-structure of asisite, nominally Pb7SiO8Cl2, Mineralogical Magazine, 68, 247-254   [view file]

Jambor J L, Roberts A C (2005) New mineral names, American Mineralogist, 90, 271-275   [view file]