kidwellite
Sign in to saveAlso known as IMA1974-024
Kidwellite in an uncommon mineral that was discovered in Arkansas in the United States. It was approved by the IMA in 1974, but it was only named in 1978 by Moore and Ito after Albert Lewis (Laws) Kidwell.
Wikidata facts
- Subclass of
- phosphate mineral
- Image
- Kidwellite-160225.jpg
Show 9 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.DK.20
- crystal system
- monoclinic crystal system
- Nickel-Strunz 9th edition (updated 2009)
- 8.DK.20
- Commons category
- Kidwellite
- IMA Mineral Symbol
- Kdw
- Mohs' hardness
- 3
- streak color
- yellow
- density
- 3.34
- chemical formula
- NaFe³⁺₉₊ₓ(PO₄)₆(OH)₁₁·3H₂O (x ≈ 0.33)
Sources (1)
via Wikidata · CC0
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Encyclopedic overview
4 sectionsContents
- Properties
- Oriented intergrowths
- Discovery and locality
- References
{{Infobox mineral|boxbgcolor=#64855e|boxtextcolor = #fff|image=Kidwellite-160225.jpg|formula=NaFe3+9+x(PO4)6(OH)4·12H2O (x ≈ 0.33)|IMAsymbol=Kdw|strunz=08.DK.20|system=Monoclinic|dana=42.08.02.01|class=Prismatic H-M Symbol: 2/m|symmetry=P2/c|unit cell=1,393.77|molweight=1,368.34|color=Greenish white, light green, greenish yellow, yellow|cleavage=Perfect on {100}|fracture=Splintery|mohs=3|luster=Resinous, waxy, silky, dull|opticalprop=Biaxial (−)|refractive=nα = 1.787 nβ = 1.800 nγ = 1.805|birefringence=0.018|pleochroism=None|dispersion=Extreme|fluorescence=None|streak=Yellow|gravity=3.04 – 3.3|density=Measured: 3.04 – 3.3 Calculated: 3.34|diaphaneity=Translucent|impurities=Aluminum, Copper, Arsenic}}
Kidwellite in an uncommon mineral that was discovered in Arkansas in the United States. It was approved by the IMA in 1974, but it was only named in 1978 by Moore and Ito after Albert Lewis (Laws) Kidwell.
Excerpted from Wikipedia’s “kidwellite” article, available under the CC BY-SA 4.0 licence.