عرض مصدر ألاكتيت

{{بطاقة معدن
| name        = Allactite
| category    = [[معادن الزرنيخات]]
| image       = Allactite-116056.jpg
| caption     = Picture width 3 mm
| formula     = Mn<sub>7</sub>(AsO<sub>4</sub>)<sub>2</sub>(OH)<sub>8</sub>
| symmetry    = 	Monoclinic, point group: 2/m, [[زمرة فراغية]] P2<sub>1</sub>/a
| unit cell   = a = 11.03 Å, b = 12.12 Å, c = 5.51 Å, β = 114°, Z = 2 
| molweight   = 
| strunz      = 08.BE.30
| color       = Brown, dark to light purplish red, brownish red, colorless to white
| habit       = 
| system      = 
| twinning    = 
| cleavage    = Distinct, {001} 
| fracture    = Uneven
| tenacity    = Brittle
| mohs        = 4.5
| luster      = Vitreous, slightly greasy on fracture surfaces 
| refractive  = n<sub>α</sub> = 1.755–1.761<br /> n<sub>β</sub> = 1.772–1.786<br /> n<sub>γ</sub> = 1.774–1.787
| opticalprop = Biaxial (-)
| birefringence = 
| 2V = ~0°
| pleochroism = X = blood-red; Y = pale yellow; Z = sea-green
| streak      = Gray to faint brown
| gravity     = 3.83 (meas.), 3.94 (calc.)
| density     = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| diaphaneity = 
| other       = 
| references  = <ref>[http://www.mindat.org/min-122.html Allactite]. Mindat {{Webarchive|url=https://web.archive.org/web/20170519132337/https://www.mindat.org/min-122.html |date=19 مايو 2017}}</ref><ref name=hand>[http://www.handbookofmineralogy.org/pdfs/allactite.pdf Allactite]. Handbook of Mineralogy {{Webarchive|url=https://web.archive.org/web/20160303202122/http://www.handbookofmineralogy.org/pdfs/allactite.pdf |date=03 مارس 2016}}</ref><ref>{{استشهاد بدورية محكمة|مؤلف=Moore P. |سنة=1968|عنوان= Crystal chemistry of the basic manganese arsenate minerals: II. The crystal structure of allactite|صحيفة= American Mineralogist|المجلد= 53|صفحات= 733–741|مسار=http://www.minsocam.org/ammin/AM53/AM53_733.pdf| مسار أرشيف = https://web.archive.org/web/20181004061503/http://www.minsocam.org/ammin/AM53/AM53_733.pdf | تاريخ أرشيف = 4 أكتوبر 2018 }}</ref>
}}

'''الألاكتيت''' (Allactite) هو من معدن له الصيغة Mn<sub>7</sub>(AsO<sub>4</sub>)<sub>2</sub>(OH)<sub>8</sub> وهو من [[معادن الزرنيخ]] [[صخر متحول|المتحولة]] من بلّورات [[منغنيز|المنغنيز]] و[[زنك|الزنك]] .<ref>[http://www.mindat.org/min-122.html Allactite: Mineral information, data and localities<!-- عنوان مولد بالبوت -->] {{Webarchive|url=https://web.archive.org/web/20190406040726/https://www.mindat.org/min-122.html |date=6 أبريل 2019}}</ref><ref>[http://www.handbookofmineralogy.org/pdfs/allactite.pdf Handbook of Mineralogy] {{Webarchive|url=https://web.archive.org/web/20160303202122/http://www.handbookofmineralogy.org/pdfs/allactite.pdf |date=3 مارس 2016}}</ref><ref>Moore P. 1968: Crystal chemistry of the basic manganese arsenate minerals: II. The crystal structure of allactite. American Mineralogist, 53, 733-741; [http://www.minsocam.org/ammin/AM53/AM53_733.pdf] {{Webarchive|url=https://web.archive.org/web/20160303212858/http://www.minsocam.org/ammin/AM53/AM53_733.pdf |date=03 مارس 2016}}</ref>