Infobox mineral name Halotrichite boxwidth boxbgcolor image Mineraly.sk halotrichit.jpg imagesize alt caption A sample of Halotrichite category Sulfate minerals formula FeAl sub 2 sub SO sub 4 sub sub 4 sub · 22H sub 2 sub O. strunz 07.CB.85 dana symmetry unit cell molweight color colourless to white, yellowish, greenish colour habit system monoclinic twinning cleavage poor indistinct fracture conchoidal tenacity mohs 1 2 luster vitreous streak diaphaneity transparent, translucent gravity 1.89 density polish opticalprop refractive birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references var1 var1text var2 var2text var3 var3text var4 var4text var5 var5text var6 var6text Image Halotrichite Hydrous iron aluminum sulfate Corral, California 3009.jpg thumb left Halotrichite from California Image Halotrichite 179634.jpg thumb left Halotrichite from the abandoned http www.blm.gov ca st en prog aml project page goldenqueen.html Golden Queen mine on Soledad Mtn., just south of Mojave, CA Halotrichite , also known as feather alum , is a highly hydrated sulfate of aluminium and iron . It is formed by the weathering and decomposition of pyrite commonly near or in volcanic vents. Its chemical formula is iron Fe aluminum Al sub 2 sub sulfur S oxygen O sub 4 sub sub 4 sub · 22 water H sub 2 sub O . It forms fibrous monoclinic crystals. The crystals are water soluble. Occurrences include the Atacama Desert , Chile , Dresden, Saxony, Germany , San Juan County, Utah , and Mont Saint Hilaire , Canada . The name is from Latin halotrichum for salt hair. References http webmineral.com data Halotrichite.shtml Webmineral http www.saint hilaire.ca en halotri.htm Saint Hilaire http www.mindat.org min 1809.html mindat.org http www.mineralatlas.com mineral 20general 20descriptions H halotrichitepcd.htm Mineral Atlas Category Iron minerals Category Aluminium ... more details
Infobox mineral name Melanterite category Sulfate mineral boxwidth boxbgcolor image imagesize alt caption formula FeSO sub 4 sub 7H sub 2 sub O strunz 07.CB.35 dana 29.06.10.01 symmetry Monoclinic 2 m prismatic unit cell a 14.077 , b 6.509 , c 11.054 105.6 Z 4 color Green, pale green, greenish blue, bluish green, colorless colour habit Encrustations and capillary efflorescences rarely as equant pseudo octahedral, prismatic or tabular crystals system Monoclinic twinning cleavage 001 Perfect, 110 Distinct fracture Conchoidal tenacity mohs 2 luster Vitreous streak White diaphaneity Subtransparent to translucent gravity 1.89 1.9 density polish opticalprop Biaxial refractive n 1.470 1.471 n 1.477 1.480 n 1.486 birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility other alteration references ref name Mindat http www.mindat.org min 2633.html Mindat ref ref name Webmin http webmineral.com data Melanterite.shtml Webmineral data ref ref name HBM http rruff.geo.arizona.edu doclib hom melanterite.pdf Handbook of Mineralogy ref Melanterite is a mineral form of hydrous iron II sulfate FeSO sub 4 sub 7H sub 2 sub O. It is the iron analogue of the copper sulfate chalcanthite . It alters to siderotil by Dehydration loss of water . It is a secondary sulfate mineral which forms from the oxidation of primary sulfide mineral s such as pyrite and marcasite in the near surface environment. It often occurs as a post mine encrustation on old underground mine surfaces. It also occurs in coal and lignite seams exposed to humid air. ref name Mindat It also occurs as a rare sublimate phase around volcanic fumaroles. ref name HBM Associated minerals include pisanite , chalcanthite , epsomite , pickeringite , halotrichite and other sulfate minerals. ref name HBM It was first described in 1850. ref name HBM References Reflist Category Sulfate minerals Category Iron minerals Category Monoclinic minerals sulfate min ... more details
Infobox mineral name Cyanotrichite boxwidth boxbgcolor image imagesize alt caption Cyanotrichite , Tungoshlan, China category Sulfate minerals formula Cu sub 4 sub Al sub 2 sub OH sub 12 sub nowiki nowiki SO sub 4 sub 2H sub 2 sub O strunz 07.DE.10 dana symmetry unit cell molweight color sky blue, azure blue colour habit system orthorhombic twinning cleavage fracture tenacity mohs 1 3 luster silky streak light blue diaphaneity gravity 2.76 density polish opticalprop refractive birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references var1 var1text var2 var2text var3 var3text var4 var4text var5 var5text var6 var6text Cyanotrichite is a copper aluminium sulfate mineral , copper Cu sub 4 sub aluminum Al sub 2 sub oxygen O hydrogen H sub 12 sub sulfur S O sub 4 sub 2 water H sub 2 sub O , also known as lettsomite , very similar to halotrichite , and a member of the same group. However, it is much rarer. It forms velvety aggregates of extremely fine fibres and radial aggregates. It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or drusey coatings. The Mohs hardness is 2 and the specific gravity ranges from 2.74 to 2.95. Refractive index Refractive indices are n 1.588 n 1.617 n 1.655. It is an oxidation product of primary copper mineralization in a weathering environment with abundant aluminium and sulfate. Associated minerals include brochantite , spangolite , chalcophyllite , olivenite , tyrolite , parnauite , azurite and malachite . The main deposits are Cap la Garrone in the Var d partement Var France , Romania and Arizona USA . Because of its beautiful colouring, it is very popular with collectors. It was first described in 1839 from Moldova Nou , Banat, Romania. The name is from Greek language Greek kyaneos for blue and triches for hair referring to the typical color and habit. Referen ... more details
Technical date July 2011 Image Ortoclasio.jpg thumb right 200px An example of the monoclinic crystals, orthoclase In crystallography , the monoclinic crystal system is one of the 7 lattice point group s. A crystal system is described by three Vector geometric vectors . In the monoclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system. They form a rectangular prism geometry prism with a parallelogram as its base. Hence two pairs of vectors are perpendicular, while the third pair makes an angle other than 90 . Bravais lattices and point space groups Two monoclinic Bravais lattice s exist the primitive monoclinic and the centered monoclinic lattices, with layers with a rectangular and rhombic lattice, respectively. class wikitable Monoclinic Bravais lattice Primitive P Base centered C image Monoclinic.svg 100px image Monoclinic base centered.svg 100px Crystal Classes The monoclinic crystal system class names, examples, Sch nflies notation , Hermann Mauguin notation , crystallographic point group point groups , International Tables for Crystallography space group number, ref name ITC cite book title International Tables for Crystallography doi 10.1107 97809553602060000001 isbn 978 1 4020 4969 9 editor first E. editor last Prince year 2006 publisher International Union of Crystallography ref orbifold , type, and space groups are listed in the table below. class wikitable align center rowspan 2 colspan 5 Point group rowspan 2 Example rowspan 2 Type colspan 8 rowspan 2 Space groups Name Schoenflies notation Sch nflies Hermann Mauguin notation Intl orbifold Coxeter notation Coxeter 3 5 monoclinic ref name x name cite web title The 32 crystal classes url http www.cartage.org.lb en themes sciences physics SolidStatePhysics AtomicBonding CrystalStructure 32Crystal 32Crystal.htm accessdate 2009 07 08 ref C sub 2 sub math 2 math 22 2 sup sup halotrichite enantiomorphic Chemical polarity polar math mathrm P 2 , math math mathrm P 2 1 , ... more details
Infobox settlement official name Mojave settlement type census designated place image skyline Halotrichite 179634.jpg imagesize image caption Halotrichite from the abandoned http www.blm.gov ca st en prog aml project page goldenqueen.html Golden Queen mine on Soledad Mtn., just south of Mojave image seal image map Kern County California Incorporated and Unincorporated areas Mojave Highlighted.svg mapsize 250x200px map caption Location in Kern County, California Kern County and the state of California image map1 mapsize1 map caption1 coordinates region US CA subdivision type List of countries Country subdivision name USA subdivision type1 Political divisions of the United States State subdivision name1 flag California subdivision type2 List of counties in California County subdivision name2 Kern County, California Kern government type leader title California State Senate Senate leader name Roy Ashburn California Republican Party R leader title1 California State Assembly Assembly leader name1 Bill Maze R leader title2 California s 22nd congressional district U. S. Congress leader name2 Kevin McCarthy California politician Kevin McCarthy R established date Area area magnitude unit pref US area footnotes ref http www.census.gov geo www gazetteer files Gaz places national.txt U.S. Census ref area total sq mi 58.375 area land sq mi 58.29 area water sq mi 0.085 area total km2 151.188 area land km2 150.969 area water km2 0.219 area water percent 0.14 area note elevation ft 2762 elevation m 842 population as of 2010 population footnotes population total 4238 population metro population density km2 auto population density sq mi auto timezone Pacific Time Zone PST utc offset 8 latd 35 latm 03 lats 09 latNS N longd 118 longm 10 longs 26 longEW W coordinates display inline,title elevation footnotes ref name gnis gnis 1652752 ref timezone DST PDT utc offset DST 7 postal code type ZIP code s postal code 93501, 93502, 93519 area code Area code 661 661 blank name Federal Information ... more details
OH Halotrichite supergroup Hydrated acid and sulfates where A B sub 2 sub XO sub 4 sub sub 4 sub x H sub 2 sub O Halotrichite group Pickeringite MgAl sub 2 sub SO sub 4 sub sub 4 sub 22H sub 2 sub O, Halotrichite Fe sup 2 sup Al sub 2 sub SO sub 4 sub sub 4 sub 22H sub 2 sub O, Apjohnite MnAl sub 2 ... more details
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