ERYTHRITE

This article appears in Volume V09, Page 758 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: EMS-EUD

ERYTHRITE , the name given to (I) a

mineral

MINERAL

composed of a hydrated

cobalt

COBALT (symbol Co, atomic
weight
- WEIGHT
59)

arsenate, nd (2) in

chemistry

, a tetrahydric alcohol. (I) The

mineral

MINERAL

erythrite has the

formula

Co3(AsO4)2.8H2O, and crystallizes in the monoclinic system and is isomorphous with vivianite. It sometimes occurs as beautiful radially-arranged groups of blade-shaped crystals with a

bright

BRIGHT, JOHN (1811-188g)
BRIGHT, SIR CHARLES TILSTON

crimson colour and brilliant lustre. On exposure to light the colour and lustre deteriorate. There is a perfect cleavage parallel to the plane of symmetry, on which the lustre is pearly. Cleavage flakes are soft (H=2), sectile and flexible; specific gravity 2.95. The mineral is, however, more often found as an earthy encrustation with a

peach

PEACH
PEACH, CHARLES WILLIAM (1800-1886)

-blossom colour, and in this form was early (1727) known as

cobalt

COBALT (symbol Co, atomic
weight
- WEIGHT
59)

bloom

BLOOM (from A.S. bloma, a flower)

( Ger. Kobaltbliithe). The name erythrite, from ipv0pbs, " red," was given by F. S. Beudant in 1382. Erythrite occurs as a product of alteration of smaltite (CoAs2) and other cobaltiferous arsenides. The finest crystallized specimens are from Schneeberg in Saxony. The earthy variety has been found in Thuringia and

Cornwall

CORNWALL

and some other plates. (2) The alcohol erythrite has the constitutional

formula

HOH2CCH(OH)CH(OH)CH2OH; it is also known as erythrol, erythroglucin and phycite. It corresponds to tartaric acid, and, like this substance, it occurs in four stereo-isomeric forms. The internally compensated modification, i-erythrite, corresponding to mesotartaric acid, occurs free in the algae Protococcus vulgaris, and as the orsellinate, erythrin, C4H6(OH)2(OC8H203)2, in many lichens and algae, especially Roccella montagnei. It has a sweet

taste

TASTE (from Lat. taxare, to touch sharply; tangere, to touch)

, melts at 126, and boils at 330. Careful oxidation withdilute nitric acid gives erythrose or tetrose, which is probably a mixture of a trioxyaldehyde and trioxyketone. Energetic oxidation gives erythritic acid and mesotartaric acid. i-Erythrite and the racemic mixture of the dextro and laevo varieties were synthesized by Griner in 1893 from divinyl.

End of Article: ERYTHRITE

If you wish, you can link directly to this article.

<a href="http://jcsm.org/StudyCenter/Encyclopedia/EMS_EUD/ERYTHRITE.html">
ERYTHRITE
</a>

(Previous)
ERYTHRAE [mod. Litri]

(Next)
ERZERUM, or ARZRUM (Arm. Garin)

JCSM was founded in 1997 and exists to help the community and bring people into a life-changing and productive relationship with Jesus Christ. JCSM offers over 200,000 free web pages, including its weekly inspirational emails that were sent continuously for over a decade.

Jesus Christ Saves Ministries
P.O. Box 9297
San Diego, CA 92169
1-888-887-0417 or Email

Sponsored Advertisements

Online First Aid and CPR Certification . DHA Solutions . PB Happy Hour Specials . Improvising Made Easy For Guitar and Bass . The Skeptic's Annotated Bible: Corrected and Explained . Home Equity Loans . First Aid and CPR Online . San Diego Music Lessons . 10,000 Wise Quotes and Spiritual Sayings . Blow Up Your Site (For Free!) . San Diego DUI Lawyers . Jason Gastrich . Jordan Faith Gastrich . Divorce Secrets Revealed . Post Your Ad Link Free . San Diego Soccer Training . JCSM . Download Sermons . Custom Religious Banners, Build A Sign . Christian Singles Dating . Christian T-Shirts . Healing Christian Prayer . Bumper Authority . Personalized Blogs and Email . San Diego Haircuts . The Do the Math Diet . Stop Twitter Spam . Christian Conservative Work at Home Network . The Website of the Lord