Axinite-(Mg) R070133

Name: Axinite-(Mg)
RRUFF ID: R070133
Ideal Chemistry: Ca4Mg2Al4[B2Si8O30](OH)2
Locality: Merelani, Tanzania
Source: Michael Gray [view label]
Owner: RRUFF
Description: Pale brown cut gem stone
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Axinite (12) ]
RRUFF ID: R070133.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca4.00(Mg1.86Al0.08Mn0.06)Σ=2Al4.00[B2(Si7.92Al0.08)Σ=8O30](OH)2; B and OH not measured but assumed by stoichiometry
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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Raman Mode Analysis
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RRUFF ID: R070133
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 10% of 150mW
RRUFF ID: R070133.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 7.134(1)Å    b: 9.157(2)Å    c: 8.934(2)Å
alpha: 91.94(1)°    beta: 98.11(1)°    gamma: 77.46(1)°   Volume: 564.0(3)Å3    Crystal System: triclinic
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Axinite-(Mg)

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]

Jobbins E A, Tresham A E, Young B R (1975) Magnesioaxinite, a new mineral found as a blue gemstone from Tanzania, The Journal of Gemmology, 14, 368-375

Fleischer M, Cabri L J (1976) New mineral names, American Mineralogist, 61, 502-504   [view file]

Andreozzi G B, Lucchesi S, Graziani G (2000) Structural study of magnesioaxinite and its crystal-chemical relations with axinite-group minerals, European Journal of Mineralogy, 12, 1185-1194

Burke E A J (2008) Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks, The Mineralogical Record, 39, 131-135   [view file]